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Joined: Sep 2016
Posts: 1,313
Campfire Regular
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Campfire Regular
Joined: Sep 2016
Posts: 1,313 |
The sectional density advantage only exists because you are comparing bullets of higher SD in the 7mm to ones of lower SD in the 300.
Nice theory, but not true. Here's your task: find a .308 bullet with a higher SD and higher BC than the .284 175gr Weldcore. It must be a lead core bonded hunting bullet with 90%+ weight retention. I'm not going to hold my breath because you'll be looking for a while. Nosler Accubond Long Range 210 grain .30 cal. SD .316 G1 BC .661 https://www.midwayusa.com/product/1010505254?pid=149294Close, but crap weight retention. At least you tried 
Last edited by Llama_Bob; 08/29/19.
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Joined: Mar 2006
Posts: 14,513
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2006
Posts: 14,513 |
A minimal increase in SD and a minimally flatter trajectory are both significantly more important in the killing of critters than a minimal increase in kinetic energy. The difference in hole size in the critter is also minimal. At the end of the day, when it comes to killing power any variable that aids in precise bullet placement trumps one that doesn't, like energy or caliber.
The success of the .300 WSM vs the 7 WSM has nothing to do with the merit of each cartridge, and everything to do with the 30-cal bias of the American people. Of course other factors, like ammo selection, the long-standing 7mm dominance of the 7mm Rem Mag at a critical time when the 7 WSM was trying to gain a foothold, etc, play a role, but the 30-cal bias is a huge one.
The sectional density advantage only exists because you are comparing bullets of higher SD in the 7mm to ones of lower SD in the 300. I could compare a 200 grain 30 cal bullet to a 140 7mm bullet and claim the same. Additionally, you claim these differences are significant. At the ranges 99% of game is killed they are irrelevant. No, I claim that they are more important than some minor difference in kinetic energy, which is nearly worthless as a predictor of killing effectiveness. Guys often argue that BC is irrelevant within "hunting ranges", since they're thinking only of how it affects elevation, but the difference in BC between two bullets can be significant in terms of wind drift from the muzzle on out, when the wind is blowing... At the end of the day, the differences in effectiveness between the .300 WSM and 7 WSM are very minor within a few hundred yards.
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Joined: Aug 2009
Posts: 96,158 Likes: 3
Campfire Oracle
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Campfire Oracle
Joined: Aug 2009
Posts: 96,158 Likes: 3 |
The sectional density advantage only exists because you are comparing bullets of higher SD in the 7mm to ones of lower SD in the 300.
Nice theory, but not true. Here's your task: find a .308 bullet with a higher SD and higher BC than the .284 175gr Weldcore. It must be a lead core bonded hunting bullet with 90%+ weight retention. I'm not going to hold my breath because you'll be looking for a while. Nosler Accubond Long Range 210 grain .30 cal. SD .316 G1 BC .661 https://www.midwayusa.com/product/1010505254?pid=149294Close, but crap weight retention. At least you tried Yeah right. 
Life Member SCI
Life Member DSC
Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell
Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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