Hi brothers,
I've been running 300 blk for several years now in a 9" BCM. It's been great and plenty accurate with my (own load) heavy subs. But as I've read is a common problem, I cannot for the life of me, get a load for supers that yields any decent accuracy. Tried Barnes 110s and 120s, Hornady 150 fmjs etc. Read a few articles that have me concluding that 1/7 twist is over stabilizing those shorter, lighter bullets which is causing the problem. So I tested my super loads in a friend's 1/8 twist upper and the accuracy was much improved.
That, combined with needing something to throw my NF 1-8 and another 30 cal can on, has me looking to put together a rig in 300blk with a 12.5" - 16" barrel with a 1/8 twist for the supers. Berger's stability calculator and my friend's upper tells me 1/8 twist will still stabilize my 225 grain subs. Already checked BCM,Noveske,DD,POF, PRI, American Defense,Seekins etc.. Everybody either only does 1/7 twist or only has pistol length uppers. Any ideas??? Thanks.
I've been running 300 blk for several years now in a 9" BCM. It's been great and plenty accurate with my (own load) heavy subs. But as I've read is a common problem, I cannot for the life of me, get a load for supers that yields any decent accuracy. Tried Barnes 110s and 120s, Hornady 150 fmjs etc. Read a few articles that have me concluding that 1/7 twist is over stabilizing those shorter, lighter bullets which is causing the problem. So I tested my super loads in a friend's 1/8 twist upper and the accuracy was much improved.
That, combined with needing something to throw my NF 1-8 and another 30 cal can on, has me looking to put together a rig in 300blk with a 12.5" - 16" barrel with a 1/8 twist for the supers. Berger's stability calculator and my friend's upper tells me 1/8 twist will still stabilize my 225 grain subs. Already checked BCM,Noveske,DD,POF, PRI, American Defense,Seekins etc.. Everybody either only does 1/7 twist or only has pistol length uppers. Any ideas??? Thanks.