Finally bought my first NFA items.
- Thread starter Mars5l
- Start date
Ohen Cepel
Member
I haven't looked at the Obsidian but do read the details on the rating; barrel length, pressures, etc. It may be fine (don't know) on a 22in with Trapdoor loads but NOT fine on a 16in barrel shooting Buffalo Bore through it.
Ran into that with others in the past, need some barrel length to get the pressure down. If shooting subsonic, it may not matter (within reason).
Ran into that with others in the past, need some barrel length to get the pressure down. If shooting subsonic, it may not matter (within reason).
horsemen61
Member
- Joined
- Oct 20, 2011
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- 6,804
MachIVshooter
Member
The Obsidian requires a 16" barrel for .45-70, and Rugged does not say no to supersonic loads, but given that they do stipulate subsonic only for .458 SOCOM, might not want to run the hottest .45-70 ammo.
Pistol cans with heavy .45-70 won't sound that great anyway, light on volume for 50-60 gr powder charges. We do rate our TLX 45 for the hot stuff, but if guys are gonna run mostly that, I recommend the larger rifle cans.
Also keep in mind that supersonic .45-70 is still relatively slow with a lot of bullet frontal area, and that produces substantial sonic crack; supersonic .45-70 will not be "hearing safe" regardless of suppressor.
Regarding the Obsidian, do make sure your alignment is good, including when taking up the slop in all directions with the booster or using a 3 lug. Front cap strikes are pretty common with the Obsidian, and sometimes the baffles get it too.
I would strongly recommend using an Alpha direct thread mount or taper mount system with fixed barrel hosts rather than a fixed barrel spacer on the piston.
maxxhavoc
Member
Subsonic 45-70 is pretty quiet from an Obsidian, all things considered. My 45 acp Mauser build (Rhineland) is just about pellet gun quiet.
MachIVshooter is dead on with caution about front cap strikes. The Obsidian likes to loosen and unscrew with shooting on direct thread. Check it occasionally to see if it needs tightening.
MachIVshooter is dead on with caution about front cap strikes. The Obsidian likes to loosen and unscrew with shooting on direct thread. Check it occasionally to see if it needs tightening.
Any advice on where and what Mount? Prices on these things is ridiculous. Can you point me to a decent mount that is affordable for multiple thread patterns?
MachIVshooter
Member
You have a number of options, they are 1.125-28 Alpha compatible cans.
If you're trying to swap between multiple fixed barrel hosts with different threads, a taper mount is my recommendation.
Basically 3 pattern options for that:
-Griffin taper mounts. Griffin makes an Alpha adapter, as do we.
Rearden/Cherry Bomb pattern. Alpha adapters from Rearden, Q and us
Gyrex system. This is our taper mount, we support a lot of thread patterns and calibers, especially with our mini brakes.
Another option is Griffin Cam-Lok or EZ-Lok, which is the lightest and smallest, but I don't believe common.45 cal rifle thread patterns like 5/8-24 and 11/16-24 are supported.
There are QD systems adapters like ASR and Keymo for Alpha pattern, too, but they are large, heavy and expensive.
