It is important to make clear that we are looking at recoil energy and not the actual kick or felt recoil, though increased recoil energy for one round over another will often translate to increased felt recoil of the same round. I currently have both a 700 Remington and a M77 Ruger type rifles. If you were of the mind to get as much penetration as possible, the numbers say the .300 WM is better suited. For bigger and more dangerous game, you might like the kinetic energy and larger bullets of the .300 Win Mag but as we discussed in the previous sections, we would be comfortable with either cartridge in these hunting scenarios. While hand loading and the art of balancing the various components that go into a cartridge is a topic worth discussing, it is beyond the scope of this article. Both camps have fervent followers, and both are highly effective in the game fields. Unlike the last couple of performance categories we have looked at, here we see a distinct difference between the two cartridges more so than just between different rounds. Both of these combined, barring bullet design, indicate that the .300 Win Mag should have better penetration potential. has an obvious weight advantage, topping out at 240 grains. More than enough to have a good feel for their strengths and their weaknesses. Comparing the two, the .300 Win. In fact the 300 Win Mag is about the breaking point that most folks can handle before recoil becomes an issue. 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. 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. And what shouldn’t be lost, is that while the .300 Win Mag does seem to have more KE, the amount that the 7mm RM rounds generate are not insignificant. Mag. And it ain’t bad on kudu, oryx, wildebeest, and even eland. It was initially developed between the years 2010 and 2011, then underwent further R&D towards optimum throat geometry with batch reamer production beginning in February 2017. For a bullet to quickly kill an animal, it must reach the vital organs. Within three years, we’d see the two most popular magnums appear on the shelves. The sectional density correlates with the amount of penetration a bullet will have on the target, and since we are not looking at bullet types and designs in this article, we think the SD is a good means of comparison for two cartridges. Let’s see if the trends continue in the same direction when we look at more rounds for both cartridges. Look on any forum discussing shooting and the ballistics of a certain cartridge, and you are bound to see the topic of trajectories pop up. Friday, August 31, 2018. Winchester, seeing the wisdom of the .308 Norma Magnum and an opportunity to produce a .30 caliber magnum with the Winchester moniker, extended the case length from 2.50″ to 2.62″, shortening the neck length to 0.264″ to give plenty of case capacity while still fitting in a long-action receiver. 7mm Rem. Both cartridges were released to the public hardly a year apart and further adds to the rivalry that has been raging. Most weights are within the 150-200 grain range, but there are several lighter and heavier rounds available. 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. This means that the momentum of a rifle's reaction will exactly equal the momentum of the bullet and powder gasses ejected from the barrel. We think which cartridge has the better accuracy comes down to the person pulling the trigger and their level of experience shooting said cartridge. We also hope that you have come to the same conclusion as we have after researching these two cartridges. is a hard hitting and accurate cartridge, offering a 150 fps velocity increase over the .30-06 Springfield. These are factory loads, and the performance data we are looking at comes from the manufacturer’s website and well trusted and accurate ballistic performance calculators. The .300 Win Mag rounds have an average of 80.0lb/f.s while the .300 Win Mag has an average of 77.12lb/f.s. More expansion causes a larger wound and also transfers the energy carried by the bullet more efficiently. We kept both of these cartridges with being fired with a 9lb firearm, and the powder loads were selected from load data. Cinder blocks with these two power houses!!! In the larger data set, the .300 Win Mag had a .006 advantage over the 7mm RM rounds. These results shouldn’t be too surprising. This is common, and most are not even aware that this occurs and when it does, it is usually not a noticeable difference. 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. Instead, your advantage is going to be achieved by selecting from individual rounds and both the .300 WM and the 7mm RM have rounds with phenomenal trajectories. The .30/06 vs. the .300 Winchester Magnum. Let’s step out and take a look at the trajectories of the 7mm Rem Mag vs .300 Win Mag at increased distances (Graph 6). The popularity of magnum cartridges is undeniable; Americans have had a long love affair with speed, and I doubt that will end anytime soon. (Graph 4). At these normal hunting ranges, you are not going to get an advantage by going with one cartridge over the other. We did feel the need to mention it, but both the 7mm Rem Mag and the .300 Win Mag cartridges can drive nails with some practice on your end, and they can do it from a distance. 'Overbore' is the favorite term of the detractors. Even without the highest performing round, we still see the rounds from each cartridge grouping together pretty tightly. To some these numbers aren’t going have any sway in their decision. It is versitile, flat shooting, has reasonable recoil, and with the effeciency of its projectiles, offers downrange energy rivaling many of the .300 Win loads. A bullet’s design, their BC, and the muzzle velocity all influence the trajectories. 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. Below, you will find the numbers for the larger data set. This way, you can have more data at your disposal if you are looking to make a decision, and it will also check our small sample group and help us confirm that the results we are seeing is accurate for the cartridges as a whole. The 7mm Remington Magnum was the first on the scene, released in 1962 in conjunction with the new Model 700 rifle. The 7mm Remington Magnum drives the wide variety of 7mm bullets, from 120 to 175 grains, at respectable velocities. 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. It’s indisputable that a .30 caliber delivers more energy than a comparable 7mm. Just between cartridges, we don’t think there is enough of a difference to choose one over the other based on price. Another guy uses a 7mm. The top two performing rounds are a 7mm Rem Mag and a .300 Win Mag option, and they only have a difference of .6″. 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. Mag. So why exactly is trajectory important, more specific, why is how flat a trajectory is so important? 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. The higher the sectional density, the less resistance the bullet encounters because of the smaller area that is interacting with the target. For the sake of clarity and brevity, we decided on only five selections each. I know you are a huge proponent for the 338 Lapua Mag, which is why I have looked at it as a serious build. Both cartridges also have heavy enough bullets and the terminal ballistics to be used for larger game such as elk, moose, and more exotic game and still have a wide effective range. Huston is a hunting enthusiast who believes your success in the field is directly correlated to the amount of preparation at home. If you’re interested in the averages, the 7mm Rem Mag has an average BC of .56 while the .300 Win Mag has an average BC of .553. That is not to say that there aren’t .300 Win Mag options that can give you very similar performances, but most would rather not deal with the increased recoil for dozens of shots within a short time frame. From the muzzle out to 300 yards, all of the .300 Win Mag rounds show higher bullet energy than the 7mm Rem Mag rounds. And like we have mentioned before, using a proper bullet and putting it in the right spot can make up for lack of energy. In these 3 calibres I'd use 140 grain bullets in the 7MM-08, 165's in the 308, and 180's in the 300 Win Mag, and ( especially..) all with partition bullets from the Nosler brand. And why wouldn’t it? 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. 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. When comparing to other popular hunting rounds, including other 30-cal bullets the .300 Win Mag is a newcomer.

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