When you buy through links on our site, we may earn an affiliate commission. Both cartridges fit through standard length actions, both maximize performance in 26-inch barrels but do fine in more convenient 24-inch tubes. This is an extremely popular caliber for long-range shooters including those chasing big game. Since these two cartridges were nearly identical in their BC’s, let’s see if the same trend continues when you look at the short and long range trajectories. It’s all nitpicking to us. Discussion Starter • #1 • Mar 20, 2009. Just as with the smaller set of rounds we just looked at, these two cartridges are nearly identical in their trajectories. And you can’t discount the role recoil can play in accuracy. Below you will find the velocity averages for the two cartridges. Handgun Back. As we move out the 300-yard mark, there is a little more spread between the rounds but still no clear cut advantage for one cartridge over the other. We know from basic physics that if the cartridge can be fitted with larger and heavier bullets and sent downrange at increased speeds (more powder) than they should carry extra force with them. It is a common mistake to think that the maximal velocity you can get out of a round means a better overall performance. The 7mm (.284-inch) bullet drops less at all ranges even though the .308-inch bullet has a more efficient, minimum drag B.C. 7mm Magnum Showdown: 7mm Rem. Heck, one person’s results can be different from day to day. If we look at some of the ballistics data such as the ballistic coefficients and the trajectories, there is not a whole lot of difference between the two cartridges in either category. By the time they reach the 500-yard mark, that difference is nearly cut in half to 224.4ft.lb of difference. We have calculated the sectional densities for all ten of the selected rounds have compiled them here (Graph 8). A war’s been raging since 1963. And for hunters, where you might not have all the time in the world to take a shot, the fewer variables you have to account for the better. This is more than enough velocity to get proper terminal ballistics for these rounds but keep in mind some of these are not intended for hunting purposes. If you need a round that’s going to resist wind deflection and drag, both the 7mm RM and the .300 WM have options to get the job done. The top two performing rounds are a 7mm Rem Mag and a .300 Win Mag option, and they only have a difference of .6″. INDEX/ WT BALLISTIC EDI NO. Mag., the new .28 Nosler, and the over-the-top 7mm RUM—a shoot-off to find the best. Compare all 7mm Remington Magnum ammunition manufacturers on one easy to read chart. Meaning, how well can the object, a bullet in this case, overcome resistance and keep moving forward. While some of you might have no interest in the history of either of these rounds, we not only think it is interesting, but we think that if you have an idea of why these cartridges were designed and produced gives you a better understanding of their intended uses. With two decades of chasing all manner of upland game, hooved mammals, strutting gobblers, and any small game that can fit in his Dutch oven, he hopes to offer new ideas and viewpoints on hunting and firearm concepts and traditions. 14.07 fps                              24.6 foot-pounds, 300 Win. The belted cartridge is not going to be quite as accurate as a rimmed cartridge by design. At these normal hunting ranges, you are not going to get an advantage by going with one cartridge over the other. If you look around the internet long, you will find that there are circles of devout followers and also unbelievers in the .300 Win Mag for various reasons. Just because it can be done does not mean it makes sense, despite what you might read in advertising copy. While this category was a little more clear cut when thinking about the difference between the cartridges as a whole, there are still instances where some of the 7mm Rem rounds produced KE around or above the average of the .300 WM rounds. Rifling Twist: 1:10 3. Cartridge Type: Rifle Height: 2.1" Width: 0.535" Average FPS: 3134 Average Energy: 3314 Average Gr: 152 Recoil: 2.06 Power Rank: 4.76 of 20 The 7mm Winchester Short Magnum (WSM) was designed in 2001 by Winchester Repeating Arms Company and Browning Arms Company. After we have examined these sections, we should have a much clearer understanding of where these cartridges excel and where they fall short and will let us begin teasing apart applications one cartridge might be favored over the other. All Rights Reserved, Now, you 300 Weatherby Mag. We are again looking at the bullet drop (inches) of the ten rounds, but now we are following them out to 700 yards with the firearm zeroed in at 200 yards. The .300 Norma Magnum is also another cartridge which offers some excellent long-range ballistics, and has grabbed the attention of the U.S. Army. Survival. The averages definitely lean towards the .300 WM rounds for higher momentum. In this section, we will take a look at several ballistic categories including the velocity, the ballistic coefficient, as well as the short and long range trajectory of the 7mm Rem Mag vs .300 Win Mag. From the muzzle out to 300 yards, all of the .300 Win Mag rounds show higher bullet energy than the 7mm Rem Mag rounds. Because we are looking at factory loads, we were very conservative with the amount of powder as factory loads are often loaded with grain in far less amount than the max capacity. Let’s take a look at the larger sample set and see how the two compare. Sniper Country is reader-supported. In the grand scheme of things, we don’t know if that is enough to sway you towards one cartridge or the other without taking into consideration other performance specs. We’re don’t mean to insult anyone’s intelligence, and we are probably speaking to the choir here, but a bullet’s flight path is not a straight line but rather a parabolic shape. Get our PDF with 13 pistol & rifle targets (worth $48) including expert instructions for FREE! We are not here to lobby for one cartridge over the other. We don’t think there is any difference in availability between the two, though there is less compared to other popular hunting rounds. Most brands offer 170 to 175-grain options in 7mm RM. In fact, we don’t think there is a big enough difference in these categories to make you lean one way or the other regarding accuracy from the data we have looked at here. Mag. As we start top close out this comparison, let’s try to take the results we have found and start teasing apart certain applications of these cartridges might be better suited or maybe applications where you can’t go wrong with either. Higher BC rounds tend to have flatter trajectories. This difference between the two leads us to rounds that have very similar SDs. While both of these cartridges were designed with longer range capabilities in mind, they are both also hunting rounds, and with hunting, you are going to come across as much or more shots at targets within 300 yards depending on the terrain and the game. Even then, two people’s results can be drastically different. We also hope that you have come to the same conclusion as we have after researching these two cartridges. fans don’t jump in here and spoil the argument or I’ll let the 300 RUM lovers counter. When the powder in the casing is ignited, and the bullet is forced down the barrel and down range, that energy created from the burning powder is carried by the bullet. fans don’t jump in here and spoil the argument or I’ll let the 300 RUM lovers counter. By doing this, you as a reader has a better resource and source of knowledge to make your own decision. The old 7mm Rem. We used a ballistics calculator to generate the recoil energy (ft.lb) generated from firing each of the ten rounds that we have chosen for comparison. The 7mm RM has a flatter trajectory throughout the bullet’s range, but the largest difference seen between the two cartridges is only 0.9 inches at the 400 yard mark. With a degree in Microbiology and several years of doctoral work manipulating bacterial genes, he attempts to merge the rational and unbiased thinking of scientific research with the passions of hunting and fishing. … Regardless of where your allegiances are situated in this topic, hopefully you are coming into this with an open mind, because both of these magnum rounds are tremendous cartridges and their popularity and longevity in such a cutthroat field speaks in volumes to their performance. Obviously, there is no real difference in the BCs of these two cartridges. That introduction was, I’m guessing, retaliation against Remington’s 1962 release of its equally famous 7mm Remington Magnum. The 7mm is a belted cartridge and the 300wsm is a rimmed cartridge. The polymer tip resists deformation, maximizes long-range performance and promotes expansion. It is also important to keep the sectional density in mind when looking at momentum. We do see that the Barnes .300 WM round is a big boost to the averages and without it, the average performance between these cartridges would be much similar. Cartridge availability and price are also going to be a consideration. We think that most of you here reading this article would easily adjust to the increased recoil of the .300 Win Mag, but there might be some who could easily be thrown off by the kick. G1 Ballistic Coefficient Must be between 0.001 and 1.0. The 7mm Rem Mag is a flat shooting round that is available in a good selection of bullet weights, though maybe not as many as the .300 Win Mag. For two cartridges that overlap in so many applications, it is easy to get on the path of trying to determine which cartridge is better. We are interested in how long these rounds can maintain supersonic flight because it influences the calculations you will have to make to be accurate with long range shots. Complete .300 Winchester ammunition ballistics Chart. Still, it is accepted that 1,000ft.lb of energy is a good mark for deer while 1,500ft.lb is more suitable for elk. I recently saw a rifle, in 7mm WSM, that looks interesting. Given that the mass and velocity make up bullet momentum and since there was very little difference in velocity between the cartridges and the .300 WM rounds have heavier bullets, it makes sense that they generate more momentum. Does the perfect muley cartridge really exist? When we add in more rounds, we are still seeing the same trends as before. That being said, unless you are a target shooter, you may not even notice the difference between the two. Below we have listed our ten selections to be used in this article. For long range precision shooting, both of these rounds have options to get the job done. However, the.300 Winchester Magnum generally uses heavier bullets than the 7mm Remington Magnum. So why exactly is trajectory important, more specific, why is how flat a trajectory is so important? Bullet: 7.2mm 4. Both are very capable and popular cartridges and both pack a good punch. From this graph, it is easy to see that these two cartridges show very similar trajectories out to 500 yards. Both cartridges maintain supersonic speeds over a 500-yard range and will maintain that rating over several hundred more yards. Both are loaded with a wide variety of some of the the best bullets in the world and both are widely distributed and easily found. Here are the differences in averages of the 7mm Rem Mag vs .300 Win Mag; 300yds (.34”), 400yds (1.32”), 500yds (2.62”), 600yds (3.08”), and 700yds (6.96”). Is the 300 PRC unique enough to establish itself? Hunting. Unfortunately, there is no single measurement that is going to convey to us a cartridge’s stopping power, but there are several factors that influence stopping power such as bullet energy, penetration, and bullet expansion. We are looking at the bullet drop (inches) from the 50 to 300 yards with the firearm zeroed in at 100 yards. When you have two cartridges that overlap in a lot of shooting situations each category deserves some consideration. If we do go by this rule, the 7mm Rem Mag rounds still could be troublesome for some hunters and marksmen though still a good bit lighter than the .300 Win Mag rounds. Copyright Ron Spomer Outdoors © document.write(new Date().getFullYear()) And if you need some extra power at short range the differences are nowhere enough to make you decide against the .300 Win Mag. If you are wanting a BC in the .05+ range, there are options for that with both of these cartridges. It was released to the civilian market in 1962 and quickly gained popularity in the hunting world. It's not because of the cartridge. Given that, I would happily and eagerly hunt anything with either cartridge — even charging brown bears. If you’re recoil sensitive…. Right from the muzzle, the lowest .300 Win Mag round is carrying 3,474ft.lb of force while the highest 7mm Rem Mag round is carrying 3,303ft.lb of force. Contrary to popular belief, the heavier bullet does not drift less in the wind. A war’s been raging since 1963. With that, we feel it’s important to look at the short range trajectories (Graph 5). Like the smaller sample set and like the averages we saw when examining the short range trajectory, there is not a whole lot of difference between these cartridges. Here are the relative recoil levels from both 8-pound rifles in the above scenario: Recoil Impulse          Recoil velocity of rife              Free recoil energy, 7mm Rem. Mag. And with the internet at your disposal, finding exactly what you need has never been easier. And like earlier, as the rounds move downrange, the gap between the two did shrink. Parent Case: .30-03 Springfield 2. Tomahawks Are Back: These American Relics Have Seen a Resurgence in Military and Survival Situations . For penetration, we will actually look at two different metrics, the sectional density and the bullet momentum. More Hunting. To do this, we have selected five popular rounds from each cartridge that include several different bullet weights and intended applications. You can cherry pick a round from each and see quite a bit of difference as we did earlier, but there are a lot that carries very similar energies, and we saw that as they travel downrange they even out even more. Astute readers will notice a few things from these numbers: Our current fad for long range shooting makes these studies in ballistics fascinating, but at “normal” hunting distances, neither cartridge has an appreciable advantage over the other. Both the 7mm Rem Mag and the .300 Win Mag can be used for medium sized game such as deer, hogs, antelope, and sheep at just about any realistic hunting range. It charts everything; drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Those are always the deciding factors: right bullet, right place. And when we say highest or lowest performing, we mean that in regards to only the momentum numbers. It also means that if you look around at handloading website, you are going to see numbers that sometimes vastly outperform the rounds we will be looking at in this article. The physics and math behind the ballistic coefficient and its implications, while interesting, is not something we are going to attempt to convey in this article, but we do urge you to check it out. There are several factors that influence the amount of penetration that is going to occur, other than the type of animal. Both of these magnum rounds have been in circulation for just about the same amount of time. Though, for hunting purposes, just about all of the rounds for these two cartridges are going to be designed to hold together well and over controlled expansion. Though there is a slight difference in the averages, we don’t think it is a fair way to decide which of the cartridges have the better ballistic coefficients. When we bring in the extra rounds, we still observe the greater kinetic energy with the .300 Win Mag rounds at each yard marker along the bullet’s flight. The case and overall length of the .300 Win Mag are slightly longer than the 7mm RM, and its overall case capacity has a larger volume. That’s the year Winchester brought to market its now famous 300 Winchester Magnum. If you want a flat shooting round for short hunting situations, both the 7mm RM and the .300 WM are going to get the job done. On average, the 7mm Rem Mag rounds have a SD of .279 while the .300 Win Mag rounds have an average SD of .289, a hundredth of a difference. As long as you keep those variables constant from round to round, the trends we see are going to remain the same. We have also added an additional 1,000 yard marker for those who like to push their limits. And, like the smaller sample set that we just looked at in our graph, the difference between the two cartridge’s average is less than 100fps at each yard marker. 300 Remington Ultra Magnum Load Data; 7.62x51mm NATO Load Data; 8x57mm JS Mauser Load Data; 8mm-06 Load Data; 325 Winchester Short Magnum (WSM) Load Data; 8mm Remington Magnum Load Data ; 338 Federal Load Data; 338-06 A-Square Load Data; 338 Winchester Magnum Load Data; 330 Dakota Load Data; 340 Weatherby Magnum Load Data; 338 Remington Ultra Magnum Load Data; 338 Lapua Magnum … You will find these tables at the end of each section throughout the article. The velocity is an interesting and critical performance spec for any cartridge comparison. Though the 7mm Rem Mag rounds are a smaller caliber than the .300 Win Mag rounds, they also have lighter bullets. Some of our reasons for selecting this round is the terminal ballistics and the stopping power. A mature bull moose is going to require more penetration than a whitetail deer. If the round is not paired with the correct twist rate of the barrel, the bullet can be highly unstable in flight and become highly inaccurate. 7mm Rem Mag vs 300 Win Mag Conclusion. More than enough to have a good feel for their strengths and their weaknesses. The higher the BC, the better the bullet can cut through the wind, meaning it resists drag and wind drift much more efficiently than a bullet with a lower BC. In this case, the 7mm Rem Mag shows slightly less bullet drop than the .300 Win Mag round and even at their most distinguishable range, we are only looking at around 5” difference. Die .300 WM hatte ich mal, derzeit nutze ich gerne die mit der 7mm Rem Mag vergleichbaren 7x66 SE. Base: 13.0 mm .30-06 Springfield (7.62×63mm) 1. With that in mind, let’s bring in a more diverse selection of rounds for each cartridge and see if we still see similar trajectories. The boattail design enhances accuracy and an alloyed lead core provides increased weight retention for deeper penetration. For the .300 Win Mag rounds, all of the them leave the muzzle with over 75lb/ft.s of momentum while all of the 7mm RM rounds are below the 70lb/ft.s mark. This transfer is also affected by how the bullet reacts on impact, such as how the bullet expands. 1,002 Posts . The 7mm Rem Mag had on average slightly higher BCs and slightly flatter trajectories out past 500 yards than the .300 WM rounds, but as we stated during those discussions, there are rounds for both that perform better than others. We think which cartridge has the better accuracy comes down to the person pulling the trigger and their level of experience shooting said cartridge. Before we wrap up this article, we want to take the ten rounds we have been looking at and pick a couple that we think fits certain applications well. You can definitely save a few cents per round by looking into handloading for both of these cartridges. Ready, aim, fire! As we move out to more distant markers, we start to see more of an advantage for the 7mm RM though it is still fairly close, and there are several .300 Win Mag rounds that shoot as flat or flatter than several 7mm RM rounds. There can be no doubt that both are outstanding rifle cartridges. From this graph, we can see that the rounds do appear to group with rounds of their respective cartridge type. When thinking about how much penetration is necessary, you also have to think about the type of game you are hunting. With two cartridges that have the potential and the reputation for long range shooting, we wanted to also look at how long these cartridges can stay in supersonic flight. The recoil energy for these rounds was generated as we described earlier and used the same variables. The cartridge is also able to be to take a variety of bullet weights. We really like the lighter 7mm Rem Mag rounds for these game animals. 7mm RM Federal Nosler Ballistic Tip Vital-Shok 150gr, 7mm RM Winchester Expedition Big Game Long Range 168gr, 7mm RM Nosler Trophy Grade AccuBond 140gr, 300 WM Federal Trophy Bonded Tip Vital-Shok 180gr, 300 WM Nosler Trophy Grade AccuBond Long Range 190gr, 300 WM Federal MatchKing BTHP Gold Medal 190gr, Nosler Trophy Grade AccuBond Long Range 190gr, Winchester Deer Season Copper Extreme Point 150gr, Winchester Expedition Big Game AccuBond CT 180gr, Winchester Expedition Big Game Long Range 168gr, Barnes VOR-TX TSX Hollow Point Boat Tail 160gr, Winchester Power Max Bonded Protected Hollow Point 150gr, Federal Power-Shok Jacketed Soft Point 150gr, Remington Core-Lokt Pointed Soft Point 175gr, Hornady American Whitetail InterLock SP 139gr, Nosler Custom Ammunition Partition Spitzer 150gr. 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