what makes you choose 1 over the other in the same caliber? what do you gain or lose from 1 or the other? other than powder capacity savings as too stretch those extra rounds per pound out of it, what is in it for you? i have 264wm, 6.5prc and 6.5creed/260rem (not counting the 6.5gren) on hand. granted the 264wm is the ba i have and the rest are in ar's, so i kinda have a stopping point? some don't have the max velocity spread between them with the same bullet weight, but why-o-why do-you-do these things! i've been contemplating doing a short mag in a ba factor, but talk me in or talk me out of it?