Sorry for starting another thread about bullets, but hey that's what this section is here for right?
I've been obsessing over the 7mm 180 Berger Hybrids in my 1:9.5 twist barrel, and finally shot some today. They stabilized out to 300 yards just fine, but I'm a little worried that when the temps drop and the air gets heavy these might have a problem stabilizing.
Anyways... I got to looking at the 7mm SMK's and was running the JBM calculator for stability on these bullets. It seems that the 175's will stabilize fairly easy out of a 9.5, but Sierra recommends a 8.5.
To my understanding length has alot to do with stability.
168 Berger VLD (1.445) recommended twist 1:10
180 Berger VLD (1.525) recommended twist 1:9
175 Sierra Matchking (1.453) recommended twist 1:8.5
180 Sierra Matchking (???) recommended twist 1:8
168 Sierra Matchking (1.365) seems to be the most popular for factory twist
The 175 is just barely longer than the 168 VLD, and quite a bit shorter than the 180 VLD, so I'm confused as to why it would need more twist than either of the VLD's?
I really want to stay above .6 on the BC with whatever 7mm bullet I shoot, but this whole stability thing has got me all messed up.