Originally Posted by
az doug
If we follow the logic of the 1X8 twist for the "maximum velocity," wouldn't a 1X9 push 55 to 62 grain bullets a little faster than a 1X8 or 7? (To me it is a rhetorical question)
Many agencies issue cartridges with 55 grain projectiles and that is all their officers are going to shoot. Applying the logic of the slower twist rate equaling more velocity, then you are increasing the distance you can get effective fragmentation/terminal ballistics from a 55 grain bullet with a 1X9 twist barrel. Some I know still use 1X12 twist barrels. They are M-16A1's on lend/lease from the Federal Government.
I personally do not think the 1X9 twist is totally useless in the law enforcement community as long as agencies are issuing ammunition in 55 to 62 grain range.
I am certain I will get flamed for this, but it won't be the first time. I personally use 1X8 for competition and 1X7 for defense also, but I do not believe 1X9 is useless, just less desirable to me.