The current vogue of short barrel AR’s drives up muzzle blast and drives down velocity - the key incapacitatign component. Shooting AR’s inside a house, especially shorties seems a surefire route to permanent hearing damage for self/family/pets. Overpenetration may be a concern for some as expansion seems to require a “wet” medium.įull-size AR’s (14.5”+ barrels + muzzle device) aren’t exactly wieldy inside a house. I’ve seen some less expensive alternatives lately. creating rifle velocity type incapacitation. There are (expensive) Lehigh 300 Blackout “Maximum Expanion” 300AAC subsonic rounds with huge (1”) expansion, but these could be classified as novelty rounds and are still poking (big) holes vs. There probably isn’t a ‘right’ answer as everything is a tradeoff, but it is something I have considered and experimented with a bit. (I am leaning toward acquiring a 10.5” DDM4 300BLK pistol with LAW folder and brace, as a niche weapon, not a home-defense DocGKR, etc.: I claim no great knowledge or expertise this is just my $0.02, as I try to educate myself about the various cartridges for short-barreled ARs. 300 Whisper, by influential gun writer J.D. I do remember that plenty of game was taken with the ballistically similar. 30 WCF, and usable for the same purposes. It appears that some, perhaps many, see 300BLK as being equivalent-ish to 7.62x39 and. HD, in my urbanized area, with Fifties-era, thin-cedar-skinned bungalows, is not the same as HD “on the prairie,” where my late great-grandparents’ farm is located, and most neighboring structures are quite far away. If that's not the case, what exactly is 300BLK for?Well, HD is CQB, but CQB is not, necessarily, HD. I always had the understanding the 300BLK was supposed to give the same characteristics of good 556 ammo but in a shorter, more easily suppressed platform specifically for CQB/HD. In this review, the CAT ODB performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short barrel gas-operated rifle, which is an incredibly difficult task.This thread is throwing me for a loop. The CAT ODB represents one of the most advanced systems evaluated by PEW Science, to date. The silencer is available in two 3D-printed material options proprietary Inconel alloy and Titanium. Notably, the CAT SURGE BYPASS technology in the silencer appears to balance high flow rate behavior with superior overall signature suppression, even when over-bored for the cartridge. Its sound suppression performance on a short barrel 5.56x45mm rifle is significant. The CAT/ODB/A1/718 (CAT ODB) is a relatively compact and extremely advanced 30 caliber machine gun rated rifle silencer that exhibits significant back pressure reduction and sound signature suppression performance, for its size and caliber designation. This supplement is part of ongoing PEW Science small arm weapon system sound signature research. Both FRP and total sound signature suppression regimes are examined. This research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between five 30 caliber rifle silencers that use various technologies to suppress subsonic 300 BLK sound signatures. Quantifying these performance differentials is essential for characterizing hazards to the system operator and bystanders. However, certain designs may significantly outperform others in this regard. In general, increasing gross flow rate through a silencer can significantly reduce signature suppression performance, particularly with subsonic ammunition. Many silencers exhibit significantly different performance when using supersonic and subsonic ammunition. Their subsonic 300 BLK suppression performance provides an excellent case study comparing current rifle silencer technology. The five silencers behave differently, even despite some of them exhibiting similar performance quantified by the PEW Science Suppression Rating. The silencers in this group were selected for their relevance to the three rifle silencer technology classes: Conventional, High Flow Rate, and Hybrid Design. Five silencers evaluated by PEW Science are included in this members-only Research Supplement to examine relative First Round Pop (FRP) and overall sound signature suppression performance characteristics.
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