Just a couple of quick notes on the Bison Armory 6.8 SPC subsonic platform (AKA 6.8 BSP).
1. A 16″ Bison 1:7 twist barrel with carbine length gas will cycle 180 and 200 grain subsonic ammunition WITHOUT a silencer. This includes bolt lockback on the last round in the magazine.
2. All Bison 1:7 twist barrels will handle all commercially available 6.8 SPC ammunition, including SSA Tactical loads.
3. Field testing has shown no difference in accuracy between the 1:11 twist 16″ recon and 1:7 twist 16″ recon. Reports from customers have indicated that the 140 Sierra Game King performs extremely well when loaded supersonic in the 1:7 twist barrel, especially for ranges beyond 200 yards.
4. Shooting subsonic with or without a silencer is fun. Without a silencer we still recommend hearing protection, but simple ear plugs will do, recoil is minimal, blast is diminished substantially, all of which makes it a great back yard plinker, especially for the kids. The only draw back is the ammunition cost of the subsonic rounds.
Conclusion: Go Bison 6.8 SPC subsonic!