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[mr2jeff]

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[AlHO1966]

If going suppressed 300 blk.

[champu]

Mrgunsngear did a video discussing this a little while ago for 300 BLK

[sigstroker]

Blackout is okay. So is 9mm and .45, or even .40. I wouldn't go .458 SOCOM, it's more hassle to reload and expensive. Unless you want to hunt large critters, .450 Bushmaster is cheaper, and easier to reload. It's basically like .45 ACP on steroids, works in a standard lower, and uses AR (kinda) magazines.

.45 has about the same energy as Blackout (230 gr at 900-1000 fps) and cheaper practice ammo.

edit: Also, 6.8 spc is a dead cartridge. 6.5 Grendel would be better. Neither one would be good with a silencer.

[MrFancyPants]

I wouldn't go .458 SOCOM, it's more hassle to reload and expensive. Unless you want to hunt large critters, .450 Bushmaster is cheaper, and easier to reload.

Curious why you say 458 SOCOM is a hassle to reload? If you're going to shoot 458 then yeah reloading is best considering factory ammo is hard to find and pricey, but why would it be any more of a hassle to reload than any other caliber?

The 458 stopping power is immense compared to a 5.56, but I don't know that I'd want a thumper like that in a pistol length firearm. My 458 is a 14" barrel with a 2" brake pinned and welded, and running a rifle length buffer with adjustable gas block so I can tune it as best as I can to minimize recoil, as I've heard it's substantial. I'm just now finishing the build so I haven't shot it yet.

I do have a 300 blackout pistol with 10.5" barrel and that thing is a dream to shoot, the recoil is ridiculously light. Feels about like shooting a 22. That would be a great candidate for an AR pistol.

Sent from my SM-N960U using Tapatalk

[BrassCase]

I have two 458 SOCOM's set up as rifles. I like the 458, but I wouldn't if I didn't reload for it. Factory ammo is expensive, the brass is worth $0.80 each and cheap factory ammo is $1.50/rnd. It also kicks, I mean kicks. I have several 5.56's and they don't compare. The 458 SOCOM is the modern 45-70 and you can generally use the same bullets with either. The 458 picks up where the Bushmaster ends, 300 gr. bullets and up to 600 gr.

The 458 can take all North American game. For plinking I use a 350gr plated Berry's flat nose moving at around 1750fps. This gun is wicked and fun at the same time.

[walmart_ar15]

300BO subsonic with 220gr basically hits like 45 ACP except with rifle ballistic. It was designed for the military for sentry removal, silent operations.

For HD, I would just go with AR45 for cheaper ammo. But for hunting, 300BO for the distance.

[sigstroker]

Hornady has 395 gr .450 Bushmaster loads. Dunno if they sell the bullets for reloading.

[DrewTheBrave]

edit: Also, 6.8 spc is a dead cartridge. 6.5 Grendel would be better. Neither one would be good with a silencer.

Not sure where this malarkey came from. I'm a huge fan of the 6.5 Grendel, but 6.8 SPC is definitely NOT dead. Also, either of these two cartridges will suppress just fine. It won't be nearly as quiet as the other cartridges that offer subsonic loads, but a suppressor will absolutely tame the noise, as you can easily find if you go to forums dedicated to each cartridge.

To the OP: It sounds to me like the .300 BLK is the ideal option for your short range hunting and HD gun. If you can suppress it, even better.

With that said, if you have any desire for a ~10-12" barrel "Do Everything" gun, then 6.5 Grendel or 6.8 SPC will be much more versatile.

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[BrassCase]

How does the 300blk out compare to 7.62x39 ballistics. Is it worth it if you already own one of those. I have had 308 and recently sold it. Plan on getting a new one in the future but not currently (love the round)

They are very comparable rounds. If you want a little more umph, try the Wilson Combat 300 H'mmer. Basically a 300 BLK magnum.

https://shopwilsoncombat.com/Match-Grade-Barrel-300-HAMR-SBR-Tactical-8-1-1125-Twist-Stainless/productinfo/TR-300HSBRPG8RT11.25/

From Wilson:
300 HAM'R
The 300 HAM'R was developed for optimal terminal performance in a standard AR rifle - and offers near .308 Winchester effectiveness while exceeding the ballistics of the famous 30-30 rifle - the most popular hunting cartridge of all time.
The 300 HAM'R cartridge has 18% more retained velocity, 40% more energy and a 56% flatter trajectory than the 300 BLACKOUT at 200 yards! The 300 HAM'R has amazing accuracy and low recoil in a lightweight, compact standard AR platform rifle that uses a standard 5.56 Bolt. We recommend a 300 Blackout magazine for best overall reliablilty. Ammuntion and reloading dies/info is available from Wilson Combat.

[champu]

[BrassCase]

You'll have to do something about the upper receiver if it is a standard one because you'll never get one to eject if you don't. You could open the port yourself, or buy one as mentioned above and below.

My first 458 upper is a Aero Machine marked "458 SOCOM", now they call it the XL and it can be used for the 450, 458 and 50 Beowulf. Anderson also makes one which is on my 2nd build and there are others as well including Wilson Combat. Wilson has kits. The Aero and Anderson stripped uppers for the 458 run between $67.00 & $80.00, the others are a bit more. I find that http://primaryarms.com has a good selection. Tromix will certainly offer quality as will Wilson.

Pay attention to the thread of the muzzle. Most are threaded 5/8-24 but some are 5/8-32. Bear Creek Arsenal likes the 5/8-32 thread and they sell a brake for it. midwayusa.com has a good selection of muzzle devices.

You should also look at:
teppojutso.com He is the father of the 458 SOCOM
sbrammunition.com 458 ammo, powder and other stuff.

https://shopwilsoncombat.com/458-SOCOM/products/436/

[sl0re10]

Curious why you say 458 SOCOM is a hassle to reload?

It has been a few years and I didn't write down all the issues but I've never had anywhere near the trouble reloading a cartridge as I have had with 458 socom.

I'm still working on trying to get it working correctly (ammo to load and cycle reliably).

[champu]

You'll have to do something about the upper receiver if it is a standard one because you'll never get one to eject if you don't. You could open the port yourself, or buy one as mentioned above and below.

[kblack583]

Do a little research into the shorter barrel performance of the 6.8. Cartridge generates impressive velocity out of shorter barrels.