I have a nice flat straight section of well over 1000 yards. So biblical, that I'm suspecting that Accuracy International isn't using gunpowder at all. We have kept some of these variables as constants to better compare the two cartridges. No HTML is allowed in comments, but URLs will be hyperlinked. As I've suspected in my last review about .30-06 vs .300, I do believe that powder propellant is the defining factor in the Lapua's success. When we look at the cartridge specs for the .300 Win Mag vs .338 Lapua Magnum we see some immediate differences that will likely lead to differences in how these two cartridges perform. We will first look at the short range trajectory out to 300 yards (Graph 5). However, the.338 Lapua can generally use heavier bullets than the.338 Win Mag. Copyright © 2020 HubPages Inc. and respective owners. Of course, there are other factors, but most of us are not going to run into many scenarios where 100lb/ft.s of momentum is needed and 80lb/ft.s will not be enough. Best 9mm Ammo 2019 [Self-Defense & Target], 6.5 Creedmoor vs .243 Win – Cartridge Comparison, Best .40 S&W Ammo: Self Defense & Target Practice. This email contact address is not an "Ask the Firearms Expert" service. This round maintains over 2,000fps throughout a 500-yard flight which is more than enough to cause proper expansion of the ballistic tip bullet. We are aware that this is a small sample size compared to the options that are available, but it will still give us a nice window into how these two cartridges stack up against each other in several performance categories. Because we are using such a small sample size for the majority of our discussion, we went ahead and compiled more factory loads for each cartridge. As you can see, if you go with heavier .300 Win Mag rounds, such as the Barnes Precision Match OTM 220gr, you can get SD similar to the .338 LM rounds.

From the averages, the .338 LM has a little less than 300 extra yards of supersonic flight than the .300 Win Mag round. in the .338 Win. For these reasons, none of these cartridges seriously challenges the popularity of the .338 Win.

How much this impacts accuracy falls more on the user’s experience, and we’re not going to go into if this would give one cartridge an advantage in accuracy, but it was worth mentioning. To each their own, but the .300 Win Mag is going to give you more range along with more power and flatter trajectories than most other hunting cartridges used for the same game. What stands out to us is that there doesn’t appear to be any clear differences in velocity when looking strictly at the .300 Win Mag vs .338 Lapua Magnum cartridges. And even the popular Browning BAR was rechambered from .30-06 to this.

The .338LM rounds lost momentum at a slightly lower rate than the .300 Win Mag rounds. For more detailed ballistics information please refer to the exact round in question or contact the manufacturer for the pertinent information. Turning to retained energy at or near to MPBR, I used the ballistics calculator at www.hornady.com to calculate energy at the 25 yard increment closest to the MPBR of each cartridge and load. in the .338-378. was taken in a 24 inch barrel, while the .330 Dakota data are for a 25 inch barrel, with 26 inch barrels used for the .340 Weatherby and .338 RUM. We are looking at around 30lb/ft.s difference at each yard marker. This is an extremely popular caliber for long-range shooters including those chasing big game and those in precision shooting competitions. How well a bullet is stabilized also affects the trajectory of the bullet.

This email link is to reach site administrators for assistance, if you cannot access TFL via other means. The .338 Winchester Magnum dominates the .338 cartridge niche, because it is a perfect storm in the bore size. My local sherriff is well aware that I shoot there and has no issue with it.

This high amount of recoil energy is going to be a “necessary evil” to obtain the speeds, range, and power that comes with these two cartridges. And recoil does play a role in choosing a cartridge, especially if you are dealing with a decision on cartridges that can be used for similar applications. A 190-200gr bullet in the 300WM is stout for long range target or big game. How this trajectory translates to accuracy can be debated, but we think the slightly flatter overall trajectory of the .300 Win Mag makes it a little easier on you adjusting shot placement for a given range. If one is to strictly use a .338 for a general rifle, then the 338 Win. This bullet was practically a God send. The higher the BC, the better the bullet can cut through the wind, meaning it resists drag and wind drift and deflection much more efficiently than a bullet with a lower BC. We have compiled the BCs for the ten rounds we are using for comparison and have graphed them here (Graph 3). (.338-378 Weatherby). At this point, all of the .300 Win Mag rounds show flatter trajectory than the .338 LM rounds with the exception of the .338 LM Federal MatchKing BTHP Gold Medal 250gr round. Basically, it’s our way of making sure there are not outliers in the small sample size skewing the trends and results we will see. We have a 12lb rifle weight for the .338 rounds and a 10lb rifle weight for the .300 Win Mag round to better simulate the weight of firearms you would be using in the field. If one is after long shots, then the RUM, Lapua and the king of them all, the 338-378 Weatherby. We still see that there is a definite edge in kinetic energy associated with the .338 LM rounds and that is from the muzzle out to 500 yards. With 300 grain bullets, the win mag throws them at ~2300 fps, while the Lapua sends them downrange at 2550 – 2600 fps. These are the .330 Dakota, .340 Weatherby, .338 Remington Ultra Mag, .338 Lapua Magnum and .338-378 Weatherby. So while these numbers can vary, the general trend of recoil energy between these two cartridges remains constant. Biggest difference between the two is $$$.

We also see that there is not much difference in how the two cartridges bled momentum. The sectional density of the .200″ round is going to be higher, and it should penetrate deeper than the .300″ round. lbs.) (.338 Lapua) and 29.4 f.p.s. We still see that both of these cartridges are very similar in their trajectory and the individual rounds overlap a lot. Mag. The .300 Win Mag vs .338 Lapua Magnum is an interesting comparison, and we think provides some interesting points of discussion.

With large and dangerous game with thick hide, the huge amount of momentum and the high sectional density of the .338LM rounds are going to make getting the round through the vitals much easier. This is used to provide traffic data and reports to the authors of articles on the HubPages Service. If you have a firearm related question, please register and post it on the forums. and that is a place I do not wish to visit often. Mag. Let’s take a look at our ten rounds and see if this same trend holds up. That’s approaching safari rounds. I’ve found a lot of people finding my site when searching for differences between the 338 winchester magnum and the 338 Lapua Magnum and I wasn’t too pleased with some of the other results, so I thought I’d lay out all the differences in one spot. The barrel I have is a Proof Research that will finish at 28". Both are expensive, but Lapua brass for the 338 Lapua mag is right up there; $3 each new or $1-$2 for once fired brass. Overall, when looking strictly from an angle of the .300 Win Mag vs .338 Lapua Magnum, there is not a huge difference in the long range trajectory of these factory loads. This will obviously be a point to come back to when we look at the applications of these rounds. We have also provided the average cutoff for supersonic speeds. It also makes sense given the huge increase in recoil that we just discussed. There is no single measurement that is going to provide a perfect indicator of a cartridge’s stopping power to us. 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. This is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. Just by knowing the velocity of the bullet and how well it maintains its speeds along its flight path can tell you a lot about the terminal ballistics such as bullet expansion and at which ranges you can have maximal energy transfer and penetration. I dont want to just poke holes in paper from long range. The cartridge is also able to be to take a variety of bullet weights. It’s going to be tough hauling around a 12-15lb weapon in the field. However, five current commercial cartridges have surpassed the .338 Win. Even for hunting, where windy conditions are sometimes a factor, having a bullet with a high ballistic coefficient is going to aid in long range shots. That is 49% more powder to get 10% more muzzle velocity (MV). Wind drift and drop are both less critical with that extra speed. The energy that is carried by the bullet is only one factor of a round’s stopping power, but it is an important one nonetheless. Has anyone desiring to use a 33 caliber rifle shooting 300-gr.

Quite a few factors can influence the recoil such as bullet weight, the amount of powder, as well as the firearm weight. This is because the energy driving the bullet is localized to a smaller area effectively pushing it further with less resistance than a larger diameter bullet would impose. Wind drift and drop are both less critical with that extra speed. The heavier weights of the .338 LM rounds give it a slight edge in potential penetration from the standpoint of sectional density, but the .300 Win Mag SD is nothing to scoff at and is quite high, especially when compared to other cartridges. The decision for which round is better for a given application should be made with complete information, and this article simply serves as a comparative guide, not the final say.

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