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CraigC
Sixgun Nut
It should be lively with full loads! I'll probably order one as soon as they become available.
Some new Ruger rifles on the horizon
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Cool. I look forward to hearing all about it. I certainly understand and appreciate the reduction in dB with a suppressed bolt action rifle over a semi auto. I have a 10" barreled DD chambered in .300 BLK with a Dead Air Armament suppressor and it's not as hearing safe as I'd like shooting 220gr subsonic loads. Heck, my suppressed AI AWs (6.5 CM/.308 Win, .300 Win Mag and .338 LM) generate less noise and don't require hearing protection compared to the DD .300 BLK. 
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CraigC
Sixgun Nut
That's surprising. I was thinking about doing an AR pistol .300BO with a Shockwave brace.
DM~
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Just a little bit of bullet info first. When it comes to bullets, you "draw" them down to go smaller in diameter and "swage" them when you are going bigger in diameter.
Drawing a bullet down any more than about 3 thousands or so, "usually" degrades accuracy and the more you go down, the worse it gets. Also, with longer bullets, they will start getting banana shaped.
Another thing that happens is, the jacket loosens from the core, and that can be bad or good, depending on the application of the bullet, but usually it ends up being a bad thing.
DM
Gtscotty
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Thanks for the correction on terminology, I've never sized or swaged bullets so I'm not very familiar with the processes. I've heard that sizing down jacketed bullets can cause accuracy problems but I was more thinking about one of the many .458 cast bullets out there in the 405gr range intended for lower velocity 45-70 and the like. Do you think you would run into accuracy problems sizing cast bullets down .006"? Max hunting range for something like this for me would be under 100yds, probably closer to 50yds... It would have to be a drastic accuracy drop at those ranges to be a deal killer. I also thought that perhaps heavier bullets would use up some of the space in the case making subsonic loading easier. It would be far preferable to me to be able to load subsonic rounds with small charges of pistol powders than to have to use a filler or resort to TrailBoss ( ok, but not my favorite powder).
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Gtscotty
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There is a 11/16-24 Silencerco ASR brake for the hybrid, a Bowers AIMS adapter in 11/16-24 for their cans, and Liberty will do custom thread pitches on fixed barrel adapters for the cosmic. Also, SDTA does 11/16-24 brakes and corresponding endcaps if you want to take the form 1 approach. There may not be a ton of options, but there are a few, 11/16-24 seems to be a standard .458 SOCOM barrel threading for some manufacturers.
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It's been a long while since I made a post about the threads on my .450 BM, almost three years actually, but it turns out that the muzzle on mine is threaded 11/16"-24 like the Ruger. I sent an email to Silencerco to ask what I need in order to attach a Hybrid. The barrel O.D. is only .740" so standard muzzle thread sizes don't work too well. I'm having the barrel cut down to 16" and threaded but it looks like 11/16"-24 is the way to go ... again!
Gtscotty
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If you're OK with having a brake, this looks like the ticket.
https://www.store.silencerco.com/co...ories/products/hybrid-asr?variant=21084117700
I use a similar brake to attach my Saker to my Tikka CTR, and it is actually quite excellent at reducing recoil.
DM~
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Usually (but not always) the more you size a cast bullet, the more the accuracy goes down. You are much better off getting a mould that cast a bullet the weight and diameter you want.
Generally, cast rifle bullets are cast from fairly hard lead to prevent leading, so they don't expand well or even reliably. Get them too hard and they break up instead of expanding.
DM
The link you provided is for the flash hider but I get your point. I think the brake would be a good idea but it requires the ASR adapter so that's an additional $254 over the cost of the suppressor. Not a huge deal but something to consider. If it's a robust mounting system I'm definitely interested.
https://www.store.silencerco.com/co...ecwar-trifecta-muzzle-brake?variant=362742743
https://www.store.silencerco.com/co...arvester-big-bore-asr-mount?variant=971484716
I have very similar systems on rifles using Dead Air Armament and AAC suppressors. My only concern is that Silencerco's QD mounting sytem is very much like the AAC QD system which has been problematic for me. Does anyone have first hand experience with Silencerco's ASR QD system and the AAC 18T, 51T and 90T mounting systems? I'll be at the SHOT show in less than two weeks so will be able to take a close look at that time but if anyone has any experience to share it would be helpful.
Gtscotty
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When I click on the drop down list in the link I posted, it shows all the muzzle devices 9mm sized as a flash hiders, and the muzzle devices .46 sized as muzzle brakes. The specific item I was attempting to link to is the last option in the drop down list : ".46 - 11/16x24 Muzzle Brake".
It would require the purchase of an ASR adapter, which isn't cheap. There doesn't seem to be a Hybrid direct thread adapter for 11/16x24, but you'd think they would roll one out given the fact that the can is specifically made to handle rounds like .45/70, .458 SOCOM and .450 BM.
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