300AAC Blackout Subsonic loads

[Balthaz]

Anybody got a good load for .300 AAC Blackout 10.5 in barrel with Suppressor installed?
Just looking to see what everybody else is using.
I have Brass and Rounds on the way but wanted to reload them to run reliably in my setup.
I have a Mega Upper with a JP enterprise Silent Capture Spring and a Nickel Boron Coated Bolt Carrier.
Will be running the ARC 30 Suppressor from Dobbs Defense (thanks @Kunta Kinte for the cool Suppressor, its still in jail for a few more months).

Tips like:
1. Powder
2. Grains of Powder
3. Bullet type and Weight
4. Primer

Thanks
Balthaz

 

[Laces_Out_Marino]

In for info

 

[Okuma Steve]

I got the recipe written down at the shop. I think its like
11grains lilgun
220 grain bullets
think I been using Winchester small rifle primers

Got all the stuff sitting in my office if you want to do a few testers. I been having to use Rem 220s as a standard for testing purposes so I havent loaded much lately

 

[Balthaz]

I got the recipe written down at the shop. I think its like
11grains lilgun
220 grain bullets
think I been using Winchester small rifle primers

Got all the stuff sitting in my office if you want to do a few testers. I been having to use Rem 220s as a standard for testing purposes so I havent loaded much lately

Well then will stop by on Friday and look at load Data.....

 

[boss_hawg]

Sub'd for when - if ever - I get into reloading.

 

[Laces_Out_Marino]

I got the recipe written down at the shop. I think its like
11grains lilgun
220 grain bullets
think I been using Winchester small rifle primers

Got all the stuff sitting in my office if you want to do a few testers. I been having to use Rem 220s as a standard for testing purposes so I havent loaded much lately

are you talking about the factory load remingtons?

 

[Balthaz]

This is some info I found out on the Interwebs.
Use at your own Discretion as I have not tried any of these loads yet.
When Stamp comes in will Update with load data that I use to Make my Rifle Function properly.


Subsonic Load
Bullet: 220 gr. Sierra Match King (2240)
Powder: 10.6 gr. AA 1680
OAL: 2.090"
Ave. Velocity: 1037 fps

Subsonic Load
Projectile: 190gr Sierra Match King HPBT
Primer: Winchester Small Rifle Primers
Powder: IMR 4198
Measure: 11.0gr
Min OAL: 2.222

Subsonic Load
Bullet: Sierra MatchKing 220gr
Primers: CCI No. 400 Small Rifle
Powder: Accurate 1680
Charge: 10.9
COL: 2.245"
Trimmed To: 1.358"
Estimated FPS: 1,085
Actual Average FPS: 960.4
Magazine: PMAG 30
Results: Function flawlessly, locked back after last shot, excellent accuracy

Super Sonic Load
Cartridge: 300 Blackout
Brass: Mixed headstamp (.223 Remington/5.56 Nato)
Bullet: Nosler 125gr Ballistic Hunting Tip
Primers: CCI No. 400 Small Rifle
Powder: H110
Charge: 16.0gr
COL: 2.050"
Trimmed To: 1.358"
Estimated FPS: 1,975
Actual Average FPS: 2,015
Magazine: PMAG 30
Results: Function flawlessly, locked back after last shot, excellent accuracy

Subsonic Load
Cartridge: 300 Blackout ***SUBSONIC LOAD***
Brass: Mixed headstamp (.223 Remington/5.56 Nato)
Bullet: Berger Long Range BTHP 210gr
Primers: CCI No. 400 Small Rifle
Powder: Accurate 1680
Charge: 11.7
COL: 2.250"
Trimmed To: 1.358"
Estimated FPS: 1,104
Actual Average FPS: 1,055
Magazine: PMAG 30
Results: Function flawlessly, locked back after last shot, excellent accuracy

Subsonic Load
Lil Gun 8.2 gr
Nosler 220gr
OAL 2.220
Average FPS: 1028.00

Subsonic Loads
220 GR. SIE HPBT Hodgdon H110 .308" 2.260" 9.9 1050 29,700 CUP
220 GR. SIE HPBT Hodgdon Lil'Gun .308" 2.260" 9.0 1077 31,100 CUP

 

[Red Dawn]

Good info @Balthaz thinking about getting into reloading these. Thanks.

 

[Laufen]

Quick question. I've been considering a 300Blk, but I cant' find a good excuse for owning one. At subsonic speeds I'm getting pcc performance, at supersonic speeds it suppresses poorly. Am I missing something?

 

[PewPewPewCo]

Quick question. I've been considering a 300Blk, but I cant' find a good excuse for owning one. At subsonic speeds I'm getting pcc performance, at supersonic speeds it suppresses poorly. Am I missing something?

30 caliber AR for those that wanted a large diameter AR and large diameter terminal ballistics.

Better penetration at subsonic speeds, granted if you want ones that will expand at low speeds you'll need to look for some of the fancier bullets.

 

[Laufen]

30 caliber AR for those that wanted a large diameter AR and large diameter terminal ballistics.

Better penetration at subsonic speeds, granted if you want ones that will expand at low speeds you'll need to look for some of the fancier bullets.

Yeah, I could see how the higher ballistic coefficient would help but it still seems like splitting hairs. I don't think I would deer hunt with subsonic loads, but I guess it'd be a viable option for yotes and smaller game.

 

[PewPewPewCo]

Yeah, I could see how the higher ballistic coefficient would help but it still seems like splitting hairs. I don't think I would deer hunt with subsonic loads, but I guess it'd be a viable option for yotes and smaller game.

its just fine for deer and hog, as with anything it is shot placement and range.

 

[Dinky Dau]

With 300 blackout first time loaders and veterans need to get a Head Space gauge..I cut my cases down from the 223 to make my 300's

 

[boss_hawg]

if 300 were $0.30/round for 110 through 220 grain offerings, there wouldn't be much complaining.

it bridges a number of situations very well...for instance i would never try a 200 yard shot on a white tail with a .45acp pistol caliber carbine. I also would never hope to suppress 556 at a level lower than sub sonic 9mm.

300 offers both in one gun.

again, for those of us with multiple rifles...not a big deal.

but I say again, if it were thirty cents per round, we wouldn't have a lot of complaining, I'm sure.