Quote Originally Posted by darkker View Post
Bullet WEIGHT means very slightly more than NOTHING when it comes to stability and twist rates, so get that out of your head. People who talk weight: 1) don't know chit. 2) are making a very generalized comment.
RPM is what stabilizes, and the LENGTH is what needs stabilizing, not the weight.
RPM is a function of both twist and velocity. No two barrels are created equal, but here is a calculator to get you started:
http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
Look up your specific bullet from the tab on the left, then come back and fill in for your specifics.
Technically speaking, I am sure what you say about weight not being the issue, but rather, length is correct. However, I also believe that shooters often CORRECTLY identify various bullets by weight (as opposed to length), and , for practical purposes that is alright because heavier bullets are very often also longer because it is difficult to make a bullet heavier without also adding length, given the fact they are the same diameter to begin with. To say a slow twist rate barrel generally shoots lighter bullets better than the heavier variant of the same brand and design is not wrong. The fact they are heavier SIMPLY due to their longer length does not change the fact that they are different and indeed are intended to be shot in barrels of specific twist rates. A rose by any other name is still a rose. :)