Dr. Tad Hussein Winslow
member
- Joined
- Nov 14, 2007
- Messages
- 13,146
This cartridge is making a comeback, with Corbon making 3 loads for it, and Black Hills supposedly about to make 3 loads for it. There are also several AR15 makers who make barrels and/or complete uppers for it. Robinson Armament is considering production of 6x45 barrels for their XCR at this time (easy swap), if there is enough interest in it. If you didn't know, it's a very user-friendly "semi-wildcat", but not really a wildcat anymore as now it's standardized. Friendly in the sense that you use the same mags, same bolt, same everything, as your 5.56x45mm rifle (no swapping of anything except barrel, unlike 6.5 grendel, 6.8 spc, .30 RAR, etc.). It also uses any old plentiful .223 or 5.56x45 brass to make the brass from - no fire-forming is necessary - just expand the neck then go.
My question is this: Les Baer (and others) can and will make you a barrel/upper in either 1 in 8" twist or 1 in 9.5" twist. According to Les Baer's website, the 8 twist is for "100 gr and up bullets" and the 9.5 twist is for "less than 100 gr" bullets.
However, my question is, which of those two twists would you choose if planning to use these two rather longish bullets, creeping up on 100 grains:
1. Speer 85 gr Spitzer BT SP, and
2. Sierra 90 gr Game King FMJ BT
For a self-defense type (and possibly deer hunting) carbine, where uber-accuracy is not required, but of course good accuracy is always required???
Thanks. I'd imagine it's like 5.56x45 barrels, where there's little to no downside to erring on the side of tighter twist, but potentially a big downside to erring on the side of less twist, no? I'm thinking 8 twist, especially in light of the fact that I *might* try to use a Speer HotCor 105 and a Hornady SST 95.
Thanks.
Dang it, I forgot to make my poll!
My question is this: Les Baer (and others) can and will make you a barrel/upper in either 1 in 8" twist or 1 in 9.5" twist. According to Les Baer's website, the 8 twist is for "100 gr and up bullets" and the 9.5 twist is for "less than 100 gr" bullets.
However, my question is, which of those two twists would you choose if planning to use these two rather longish bullets, creeping up on 100 grains:
1. Speer 85 gr Spitzer BT SP, and
2. Sierra 90 gr Game King FMJ BT
For a self-defense type (and possibly deer hunting) carbine, where uber-accuracy is not required, but of course good accuracy is always required???
Thanks. I'd imagine it's like 5.56x45 barrels, where there's little to no downside to erring on the side of tighter twist, but potentially a big downside to erring on the side of less twist, no? I'm thinking 8 twist, especially in light of the fact that I *might* try to use a Speer HotCor 105 and a Hornady SST 95.
Thanks.
Dang it, I forgot to make my poll!
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