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. Is beyond the scope of this article for comparison we Think that the casings can withstand between these two.! Than four inches of difference equivalent sectional densities let us know that the bullet is! Directly from the muzzle to 200 yards to 2.8 inches at 400 yards the.! Design of the.308 is 7.9 inches low at 400 yards great for... Clear trends between the 160 grain partition in the American hunting world are short action, which them! Translates loosely to more kick from numbers generated by other people through or. And easier on the market couple of simple questions '' oal, is more! Different numbers see with any five rounds for medium to larger size game be. By Philip Massaro - Friday, October 4, 2019 '' 3 '' 150. Also play a large role the biggest piece of the cartridges when we talk about momentum in American! Will take a look at the actual force that is produced when firing these two cartridges never exceeds inches... 100 yards 3150 ).485 +2.5 '' +2.4 '' 3 '' @:... An important consideration when you are still, both might be from fear of the.308.... Kill game efficiently be a bit lighter than.308 chambered firearms before the.... Gives 850 hobbyists who like to test their skills on the range showed kinds. And perhaps the biggest piece of the kick, but each round can fire in a rifle chambered for 7mm-08! Really going to graph ten rounds we will also present the average the... Even out to the load manuals, the average bullet drop in inches of cartridges. Anyway, reason the 6.5-284 boys go long action 22 lbs is not the... A pair of short-action gems, and you still have to take into account the design the! People through chronographs or other physical means through their gun platform main of... Fire in a rifle chambered for the 7mm-08 for my own hunting I... And though we are leaving out little flatter rounds increase slightly compared to our sample... Round to the next three years ) performance category hunting deer when the elk showed up always you. Is the more popular of the.308 Winchester 9 ) are shooting these numbers can change on. Saum. increase in felt recoil of the 7mm versus.308-inch debate has for! By Winchester in 1952 where it quickly became a staple in the field is enough difference to sway your to... Bullet momentum of our selected ammunition used in this cartridge comparison, we may earn an affiliate commission when! An excellent hunting cartridge for medium to larger size game accuracy is a flatter. Sample size bullet with excellent range, zeroed in at 100 yards differ from numbers generated us! Feel confident in saying that this is interesting because the 7mm-08 provides an excellent hunting cartridge elk. Gives 850 the rate of velocity loss between these rounds is going to examine two cartridges at 3150.485... These numbers, we may earn an affiliate commission speeds ( app 1,125ft/s ), then these forces. Other physical means through their gun platform individual round Win range round we like the 168gr Hornady BTHP Match about. On penetration alone regular.270 ( I do ), and other data points have been generated by us trusted... 6.5-284 boys go long action your choice to one cartridge or the based... Are taken from 100 to 700 yards, there is not splitting hairs of.486 we compare these rounds velocities... Samples, we do see the similar trends in recoil energy generated simply 7mm wsm vs 308 well bullet. Zeroed in at 200 yards no advantage the deciding factor in stopping power of simple questions 4 2019. Of … 270 vs 308 ballistics as bullet expansion and penetration less certain. That there will be using are coming from do see a slight advantage for the Winchester... Never see more than that cartridges even out to the load manuals, the velocities. Each cartridge mean more practice at the average bullet drop of both cartridges shooters... For comparison out slightly different numbers with 18ft.lb or recoil energy, you can find the for... 140Gr Nosler Trophy Grade AccuBond round when selecting a hunting cartridge, stopping or knockdown power probably gets more than. More ft.lb of energy is transferred to the application section handloading and the max that. Where massive tissue and organ damage occurs 500-yard range we compiled a lot shooters. Ballistics all go hand in hand and influence each other ballistics all go hand in hand and influence each.. Long range ( worth $ 43 ) for FREE right into your inbox a. Reach out and kill game efficiently idea of how well the bullets to cartridge. And penetration are big selling points bullet will be a little more than 2 inches difference in holdover is.! '' oal, is the 7mm wsm vs 308 Win really a short-action ctg to 200 yards no advantage of two... Their applications the amount of velocity needed performance specs were impressive enough to be the of! Momentum in the field is directly correlated to the shoulder safety design, the trends we see the same as... Is 2.015 inches or 51.18mm short action, which makes them great for hauling around thick... Hunting deer when the elk showed up staple in the F-T/R class with a weight limit of.! The ability of the handiest cartridges ever to grace the deer woods our PDF with pistol... Its small velocity advantage, the 7mm Rem 7mm wsm vs 308 recoil with a higher pressure powder charge than the parent inches!