A while back a member here sent me the Don Miller Stability Formula applet, thank you
If I go on the Berger website I see that 308155V requires a 14 twist barrel.
If I plug in the info on that bullet from the Berger website into the Don Miller program:
@40 degrees and 2900fps
The program shows a stability of only 1.09 and that it should really have a 12.4 twist for optimum stability.
I currently shoot a 14 twist and a bit faster MV with good accuracy but I am shooting in 60 degree temps!
I am a bit concerned about cold weather shooting with this setup now, should I be?
I may see temperatures into the single digits on occasion which will drop my velocity a bit and with high pressure I may be less than 1.00 according to the program!!!
I would assume that Berger anticipates all temperature extremes with their recommendation of 1:14 twist minimum, but............