I'm getting the "because it fits in my AR" argument here loud and clear.Īnd yes, I can change the barrel and have 300 blackout. And from what I'm seeing 9x39 is pretty much a one trick pony. Just because you only run or only think people run subs in 300blk doesn't mean that's what the round was designed to do or how it is used by a lot of people. 380 performance and ballistics), while dropping weight and allowing the use of the effective supersonic rounds in other situations with only a mag change. The honey badger, which was developed at the same time, was able to dramatically improve subsonic performance over the MP5SD (which slowed lightweight NATO 9mm rounds down to subsonic velocities, essentially offering. That's why, even though it's inspiration/origin - 300 whisper - was always basically just a subsonic specialty round, the 300blk was designed to offer effective performance in supersonic form primarily (look at the origin Silvers 300blk release material) with the capability of also running subsonics if desired. The 300blk was developed mostly to put a 30 cal round in an AR/M4 platform as efficiently as possible. Is 9x39 available in supersonic? If so, how's the performance? Later on I might get a big bore I've got a casting setup which will keep the cost of ammo down and, well, 50 beowulf cases are big so they're easy to find on the ground after range practice I think it will be good for most any white tail up to medium size pigs within 100 yards. My plan is to load 75gr gold dots to max pressure and fire them from a 20 inch light profile barrel. I could go into details on all these, but by the time it was done, I went with.5.56. In fact, to plan my most recent build which is intended as a hunting rifle, I weighed the pros and cons of 300, 6.8, 6.5G, 277 Wolverine, 25-45 Sharps, 50 Beowulf, 7.62x39, and stepping up to an AR-10 in 308 for a deer and hog rifle. I will say it comes remarkably close considering x39 has about 40% more powder capacity than 300 (roughly 25gr of water for 300, roughly 35 for 7.62x39).
Maybe that's not possible in a 5.56 case. It really needed to at least equal 7.62x39, and regardless of what the interwebs claims, it doesn't. I ultimately didn't go that route because 1) the only place the steel case loads are available for pre-order has them at 34 cpr and I'd guess it'll be a while before it comes down, if ever and 2) I care more about supersonic performance that subsonic performance, and 300 in a super is ok, but not particularly impressive either.
I was seriously considering one recently with the news that Wolf is bringing some cheaper steel case ammo to market for it. In practice pmags sometimes don't work great with 300, but from what I can tell, the aluminum mags like D&H and Okay work fine with it. Every single part in a 300 chambered AR is a standard 5.56 part except the barrel, at least in theory.
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