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Old 01-19-2010, 10:09   #6
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Originally Posted by thegriz18 View Post
For rifles used for hunting and tactical or other purposes we look for loads that are fast, penetrate and expand. Then for handguns I see the same guys advocating heavy and slow 45's. Seems to me that terminal ballistics work the same for rifles as they do for handguns. Rifles that shoot bullets at higher velocity do more damage on target than bullets fired at lower velocity. Example: .308 vs 10mm, both with 180 grain bullets. When it comes to damage which one wins? Duh, the .308. It just doesn't make sense to me. If I were to make a conclusion I'd say velocity is a very important part of terminal ballistics. For those who say that BPW isn't valid, explain why a 180 grain .308 does more damage than a 180 grain 10mm. Same weight bullet, the 10mm is even larger in diameter, but the .308 wins because it has a higher velocity. If all we are doing is punching lead through tissue it seems that the two rounds would perform the same. I guess the fact that .308 beats 10mm with the same weight bullet has something to do with a pressure shock. I dunno, not tying to start a fight, but I want to point out how silly it gets on here when we debate BPW and people say it doesn't exist. If it didn't exist 10mm 180 grain loads would equal 180 grain .308 loads every time, but they don't.
Because you are talking apples & oranges. The faster handgun loads can make about 1500fps. The 308 about 2700fps. The increase in tissue damage is not linear w/ vel. but expontial. So yo ucan not compare handgun rounds to rifle rounds. Maybe when you get into some of the magnums, 41mag & 44mag or heavy 45colts, but service rounds are just not making enough vel. w/ a heavy enough bullet to give reliable penetration. I'm sure someone can get a light wt solid copper HP to get good vel & still give adequate penetration.
BTW, not all rifle rounds are selected for high vel. Even in the age of super magnums, DG hunters in Africa still choose heavy & slow for whacking the largest DG. You can have too much vel which reduces penetration & when DG is the target, penetration is king, even to the point of using solids. Not completely diff form SD rounds against humans but then we aren't talking 400gr bullets @ 2200fps.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
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