ORIGINAL: HighDesertWolf


ive read that is only true for shotguns, now with rifles its totally different from caliber to caliber. I'll have to find the article that explain this, but I do remember part of the article on a specific caliber of interest of mine that I payed close attention to which is the 308 win. the article explained that a 308 win. needs a 28 inch barrel to efficiently ignite all of its powder, but the gases would still be expanding to an even longer length and that a 308 would have to be shot through a 20 foot barrel before it would experience bullet drag in the muzzle. anyway the article explained alot about powder volume in comparison to length and diameter of the bore to determine how efficiently it would burn the powder. bottom line is barrel length does make a considerable difference in velocity.