Buffer question for .300 Blackout owners

[imarangemaster]

OK, I have a question. What buffer do you guys use on .300 blackout: Standard, H, H1, or H2. When I was using the lower on an M4 5.56 build, I used an M16 BCG and H buffer, which really smoothed it out. I will be using the same buffer and BCG on the .300 build. I was just wondering what others have on theirs.

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[browningautorifle]

I don't really have much variation available here. I'm committed to a standard.

[no4mk1t]

Assuming you don't have a switchable gas block. it all depends on three things.

What ammo are you shooting?
Supersonic, or subsonic?

Are you running a suppressor?

What length is your gas system? Carbine, or pistol?

300 BLK barrels with a carbine length gas system have a very large gas port to function with subsonic ammo. With supersonic ammo, they are a bit overgassed. Use a standard buffer with subs, and a H or H2 with supers if the recoil is a little too harsh.

With pistol gas, I'm running a H2 and it cycles reliably and locks back on the last shot.

If you are reloading, use AA1680 for subs, and W296 or H110 for supers.

[browningautorifle]

I'll keep you guys info'ed. I'm running pistol and a standard buffer. Initially it will be factory and I can't say just now if it's sub or super. BBL is 16".

[imarangemaster]

Thanks No4mk1t, It is a carbine length 1/7" barrel and non-adjustable gas system. Mostly be shooting 125 grain HP Sierra Match King 300 Blackout bullets using WW296. No suppressor (I live in Kalifornistan), and I have a H buffer in an M4 stock assembly. I may actually dabble with some hard cast (wheel weight) LEE 233 (?) grain bullets just for plinking.

[JoeHarley13]

I run a 8.5" pistol gas with an adjustable gas block (that I no longer need to adjust). Got it tuned to run 110, 125, and 147gr Supers as well as 220gr Subs without a suppressor. Subs cycle using AA1680, 100%. I'm running a Carbine buffer. No visible signs of being over gassed.

Enjoy!