27Dec

7mm wsm vs 308

When the variables are put into an equation, and we get the BC, a higher number tells us that the bullet has lower air drag, can resist crosswinds, and is less prone to wind drift than a bullet with a lower BC. Do you, as the prospective owner of one or the other of these cartridges, prefer 7mm bore diameter over .30 caliber, or vice versa? Nothing personal against the 308 Winchester. When we talk about momentum in the context of bullets, we are looking basically looking at how well the bullets can overcome resistance. In this case, we still see the two cartridges have pretty similar averages, which tells us that we will see a lot of overlap between the two with rounds for both cartridges having options with higher sectional densities. The reason computer-generated statistics are a good means for comparing two cartridges is because each gun might turn out slightly different numbers. Let’s zoom in on sections of this total range with several different rounds for each cartridge and see if any differences are more noticeable. We have listed the price for 20 rounds of our selected ammunition used in this article for comparison. For competition shooting, you are most likely going to turn to hand loaded rounds, but for the five factory loads we have looked at, we would go with the 139gr Hornady Superformance SST round. What is a better cartridge for elk and deer at about 500 yards. What was the main appeal of the 7mm at the time? Not long afterward, its performance specs were impressive enough to be adopted by the military and where it saw heavy use in Vietnam. I am familiar w/ a regular .270 ( I have a Rem 700BDL and a Savage). 270 vs 308 Ballistics. Take this with a grain of salt, as there are .308 rounds out there that have the same or better performance specs in this category. The first is obvious that both of these cartridges feature near equivalent sectional densities. Even so, it has a variety of bullet weights, mostly within the 120-150grain weight although there are heavier rounds available that are closer to the common hunting rounds of the .308. The .308 is 7.9 inches low at 300 and 23.1 inches low at 400. Even out at 700 yards, there is only 12 inches of difference. I’ve also acquired a sweet Tikka T3 Lite in 7mm-08 Remington, and have spent a considerable amount of time with that rifle, with both factory loads and handloads. It shows slightly less bullet drop than the .308 Winchester from a half inch at 200 yards to 2.8 inches at 400 yards. For comparison purposes, we have kept as many variables consistent for each round, but the numbers fluctuate + or – a few ft.lb force depending on the powder charge used by the manufacturer (not available). The open class can be very intimidating to a new shooter as this is where the deep pockets and also the best shooters tend to play. And again, these are just averages, but if you are wanting a round with the more kinetic energy, there are going to be more options in the upper end of the energy range with the .308 Win. There is not a very noticeable difference in velocity between these two cartridges. Before we get the comparisons, we do want to briefly touch on where the numbers we will be using are coming from. Because of the popularity of this cartridge, which comes from its performance, there is a wide variety of ammunition with various bullet weights and designs making it easy to match your ammunition with your intended hunting or shooting scenarios. Other situations might not require that high of bullet momentum to be effective. Still, both might be a bit much for a new hunter or shooter to cut their teeth on. When looking at the average velocities for these rounds, we see the same general trends as we did above. And the 7mm-08 on average is less than 100ft/s at each range marker. With more samples, we actually see the .308 Winchester has a higher ballistic coefficient on average. The main difference is that the .308 may be filled with a higher pressure powder charge than the NATO version. We do think that the amount of energy a bullet is carrying is important to know and understand when using these rounds for hunting purposes, but we also know that those guidelines are arbitrary. Do you feel there would be any difference between the 160 grain partition in the 7 vs. the 180 grain in the 06? Like the previous data, we do see a few ft.lb difference between the two cartridges with the .308 Win producing right at five more ft.lb more than the 7mm-08, on average. To give you some piece of mind that our sample size is a better representation of the full complement of these cartridges, we will also present the averages of twenty rounds for each cartridge at the end of each section. In energy the 270 WSM is delivering 1120 and the 308 gives 850. The 7mm-08 can use the full spectrum of 7mm bullets, from the short, frangible 100-grain hollowpoints designed for varmints, up through the 120-, 140- and 150-grain bullets which handle deer and similar-sized game so well, to the heavier 160- and 175-grain projectiles that will sort out moose, elk and black bear. 7mm SAUM (150 Sp at 3110).456 +2.5" +2.3" 3"@150: 305: 7mm WSM (150 Sp at 3200).456 +2.4" +2.5" 3"@150: 314.275 H&H Mag. For the powder charge, we used Nosler load data and took the average of several common powder loads for each cartridge and kept that constant for each round of the same cartridge. Roll out to 500 yards and the 270 WSM has dropped to 2000 fps and the 308 is going 1600, so percentage-wise 270 WSM has had it's edge increase. Let’s take a look at the bullet momentum of our ten rounds in the graph below (Graph 9). Again, a lot depends on the round you are using rather than the cartridge. This round also has an extremely flat trajectory for a factory load with only 39 inches of bullet drop at 500 yards and 105 inches at 700 yards. On average, the 7mm-08 might have slightly higher velocities and ballistic coefficients which would help keep them on the correct trajectory when used in the field. The 7mm-08 vs .308 arguments over accuracy gets heated for a lot of people, but the truth is they probably have just practiced with one more than the other. In the table below, you can find the averages for the bullet drop of both cartridges at long range. Regarding the bullet diameter issue, the 7mm versus .308-inch debate has raged for over a century, with no apparent victor. 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