After reading thru the 22 forum I'm still left confused. Much talk about the effectiveness and accuracy of the 53 gr Vmax but still questions regarding appropriate twist. I'm thinking of getting a new barrel in 223AI. Plans are to go no tighter than needed on twist; I expect to shoot bullets exclusively between 40 and 55 grains. Consensus seems to indicate a 12" twist is adequate for bullets in this weight range until the 53 gr Vmax is brought up. Is the Vmax much longer than other bullets in this weight range ? Some comments suggest a 10" or 9" twist to adequately stabilize. If you were to fire this bullet what twist would you pick ? Shooting mostly at targets and the occasional varmint. Max range is 300 yards. Accuracy is more important than speed. Currently I'm about at 1100 feet above sea level; future plans to move would get me much closer to sea level. I try not to shoot below freezing or above 95 degrees. I hope this helps. Comments and experiences with this bullet in a 223 or 223AI would be appreciated. Thanks.