To fondle? Sure if you want to spend the money on a new upper. To look at? Sure if you want to spend the money on a new upper. 300 Blackout worth the hassle of buying a new upper and investing in a new caliber if I have no intention of making it a SBR with suppressor? People will do really stupid crap that you take for granted knowing not to do. People on a shooting trip putting the wrong caliber round into my guns and me having to stop them. There are a lot of different rounds that will feed into guns chambered for another caliber. You have to be extra vigilant when it comes to what you feed into what. So some due diligence and extra precautions need to be taken if you have both in your collection. But if you drag out both 5.56mm rifles and 300blk rifles on a shooting trip with buddies/kids/etc who don't know any better.there could be a big problem! You can't watch everybody every second of the day. You the owner of the rifles are less likely to make this mistake. You're saying the bolt will close if you accidentally put a 300blk round into a 5.56mm rifle, and you're gonna have a Kaboom. Took me a second to understand what you meant with that last statement. these shorter bullets in a 300blk case will fit into a 5.56 chamber. and will do better with barrels up to 16". Bullets under 150 can get way over 2000 fps. Bullet weights from 125 up to 150, maybe 168. Twist rate will work from 1-11 up to 1-8. Trajectory and distance fall just behind a 7.62x39, or 300 savage. Supersonic application is great.much more practical. It requires a 1-8 twist barrel generally for 180-240 gr bullets. Subsonic ammo is only good for 9 inches or so of barrel length, and of course, makes good use of a suppressor. the twist rate and effective barrel length are unique to each. 223/556 and need another use for some of that pile of brass the BO is an option worth exploring.A suppressed and a supersonic 300blk are two different guns. For a cast bullet plinker or for suppressed use the 300 BO offers a pretty good platform and if you shoot a lot of. It's allowing a new generation to re-discover what a lower power 30 caliber centerfire will and won't do against big game.įor a big game hunting round I can't think of any reason to take the 300 BO over a. I'm not claiming the 300 BO is a wonder round, it is what it is, essentially a pointy bullet 30-30 in a more accurate platform that gives up ~200 fps for same length barrels. Also assuming a lever action with tube magazine, pointy bullets are a no no for the 30-30, not so for the 300 BO. The 30-30 may be a larger case, but the SAAMI max pressure is 42 kpsi for the 30-30, and 55 kpsi for the 300 BO. You just are not going to have the same performance as a 30-30.Ĭase capacity isn't everything. I'm not saying they're bad rounds, and you can kill a whitetail deer with them. I'm not a big fan of 30 WCF to begin with. You see all sorts rounds being favorably compared to 30 WCF: There's a lot of confusion at that end of the spectrum. 30-30 has bigger case capacity, so it is always going to have better potential. ![]() ![]() ![]() The idea is that 300 Blackout is like a 30-30 only better. The 300 whisper/Blackout is an option for trying to maximize what can be done with a suppressed subsonic round.Īt one point I saw a bunch of folks wanting them for whitetail deer. 9mm and 45 being the primary ones, but they really aren't great rounds for extended ranges. Yes plenty of contender barrels have been chambered in 300 whisper, but it wasn't the original platform for the round.Īs far as the appeal, if you want a suppressed semi auto platform for subsonic rounds, there aren't that many options out there. The 300 Whisper was designed for the AR platform, that is why it is the 221 fireball necked up for 220-250 gr bullets subsonic. 30 Caliber supersonic bullets are readily available. 300BO uses the same mags, bolt head, and can be easily made from 5.56 cases Load data is plentiful, and many folks are making special bullets for it. 310 Groove barrel, and bullet selections are not as good, though it may work with some. The case has a pronounced taper and needs special magazines. The 7.62x39 has a larger case head, which theoretically makes the bolt less strong in the AR. It's been around a long time, was originally invented as the.
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