Quote:
Originally Posted by 6.5x47 lapua
take a 90 grain vld bullet in 223 versus a 185 grain vld bullet with roughly the same velocity and bc out on a windy day and you will find out how wrong this theory is.bullet weight does make a difference with wind drift.This has been tried many times by alot of the top shooters in the world and the results do not change.Sometimes the math is trumped by good old fashioned experience.
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Not really wanting to get into this, but can you confirm which 223 projectile has the same B.C as the 185gr?
BC does account for bullet weight and design. There is a middle ground where long, slender projectiles have very high B.C's due to their shape AND weight. Hence the recent rage of the 6-6.5, and 7mm. For example, the 185gr 30Cal has an issue of a worse bullet design, and weight that's heavier. The added weight bumps the B.C, but won't be the same as a bullet that is lighter, has a better profile and can likely be pushed harder.
Compare the 185gr 30 cal to the 208 gr 30cal. Same thing. Those bullets are long, slender and heavy. Hence the higher B.C.