Fatelvis
Member
I have read and always heard that the early M-16s purposely had a slow twist of 1:12, to just barely stabilize the 55 grain bullet. The combination of high velocity, and a barely stabilized bullet was the goal. Upon impact, they would immediately start tumbling, creating massive wounds, while still using FMJ ammo.Incorrect. That may happen, but not reliably, and it does not rely on high velocity for tumbling. IMO, if the projectiles you are using for SD/HD tumble at those distances, they have failed in their potential.
I use varmint bullets and OTM for HD/SD, because I have seen the effects on human-sized game, and they have far more fight stopping potential than FMJ hopefully tumbling.