300 AAC Blackout Subsonic Loads

[Grmps]

Do you have any favorite subsonic loads?




I received this from Accurate;

300 AAC BLACKOUT (Subsonic Loads)
Barrel: 16" ¦ Twist: 1-10" ¦ Primer: WIN WSR ¦ Bullet Diameter: 0.308"
Case: REM ¦ Max Case Length: 1.368" ¦ Trim Length: 1.358"
Accurate 1680 Bullet weight: 230 grains.
Start load: 9.9 grains (ca 975 Fps). = Subsonic
Maximum load: 11.0 grains (ca 1100 Fps) = Subsonic
Don W.
CSR
406-234-0422
www.westernpowders.com
www.ramshot.com
www.accuratepowder.com
www.blackhorn209.com
www.montanaxtreme.com
https://www.facebook.com/westernpowders?fref=nf

[Grmps]

https://www.egglestonmunitions.com/load-data.html

300 Blackout (Subsonic)

[Handloader109]

https://www.egglestonmunitions.com/load-data.html

300 Blackout (Subsonic)

I'm trying to work up a load that will cycle my 9" pistol, h110 at 9 to 10.5 won't with a 230 gr noe. Decently accurate off hand, some ejected,but won't pick up next. Got to get some 1680 to try.

Sent from my XT1097 using Tapatalk

[Grmps]

stevespages 300 ACC Blackout 240 Grain Bullet

2400 From 9.4 grains to 11.3 grains
AA-1680 From 11.2 grains to 13.3 grains
H-110 From 9.6 grains to 11.5 grains
W-296 From 9.3 grains to 11.3 grains

I saw this on a gun forum, I haven't tried it yet
h110. 11.8 gr lee tl 230

Powders that have been tested and tried by others.
Winchester 296 - this is the same powder as H110
IMR, Co IMR 4227
Hodgdon H4227
IMR, Co SR 4759
Accurate Arms 5744
Alliant Reloader 7
IMR, Co IMR 4198
Hodgdon H4198
Alliant 2400 can work for both subs and supers

Powders for subsonic single shot, bolt action
Trail boss- good for lighter grain subs, can work for heavy subs but requires almost a full case and a very compressed load.
Alliant Red Dot - Works well for heavy subs, but very extreme spread for lighter grain subs. Not recommended for lightweight subs.
WW231
Unique
HS6
IMR 4756 Lehigh defense recommends this powder for their bullets for single shot firearms. It is finicky, but once worked up it is very quiet.
Blue Dot Heavier subs 200 gr plus
700X Seems to work well for mid-range subs

[Bohica793]

10 grains Hodgdon CFEBLK under an NOE 311-230 runs 1000fps in my 16" carbine and cycles perfectly.

[BK7saum]

Are your running these in an AR or bolt gun? Using a bolt gun opens the door wide on powders that will work and be quieter than AA1680, CFEBLK, 2400, H110, etc.

I have used Red Dot, Unique, American Select, Trail Boss, etc. in my bolt action 300. The quietest rounds are the 110-130 grain with Trail Boss or American Select at around 4-4.5 grains. They are really quiet. That said, I have some 247 Whisper rounds loaded with AA1680 to function the AR and they are significantly louder due to more gas volume and the action noise/gas from the action.

I much prefer to shoot the bolt gun subsonic suppressed.

[Handloader109]

Was in Cabelas picking up tractor parts and got a box of the S&B SR primers pretty cheap, $24 out the door with our 9.9% taxes. Couldn't bring myself to get a pound of 4198 (they had both brands) or 4227. Pressure seems much higher than the CFE BLK powder (well below 20,000 under same 230gr loads) and they were out of 1680, so I'll look some more later. No hurry.

[Moonie]

I've used around 10-11gr of RL-7 with 230-245gr cast.

[Grmps]

This will save you money @ Cabelas.
I buy gift cards for up to 13% off face value @
https://www.raise.com/buy-cabela-s-gift-cards.
You pay online and in a few minutes get a printable code or voucher.

I just picked up some 1680 and 296 at Sportsmans Warehouse yesterday, they had a lot in stock @ my location.
[no 2400 or BE ]

I've used around 10-11gr of RL-7 with 230-245gr cast.

I'll try that with 4198.

I much prefer to shoot the bolt gun subsonic suppressed.

This is my intention. Quiet accuracy with the option of a little more thump if needed.

The quietest rounds are the 110-130 grain with Trail Boss or American Select at around 4-4.5 grains.

Are you talking cast here?

[308Jeff]

10 grains Hodgdon CFEBLK under an NOE 311-230 runs 1000fps in my 16" carbine and cycles perfectly.

Would love to get my hands on one of those molds in PB, but they've been out-of-stock forever.

[dragon813gt]

Would love to get my hands on one of those molds in PB, but they've been out-of-stock forever.

Post in the inventory run forum. If five people say they want it he will run it.

[Grmps]

10 grains Hodgdon CFEBLK under an NOE 311-230 runs 1000fps in my 16" carbine and cycles perfectly.

Are you talking PB or GC

[308Jeff]

Post in the inventory run forum. If people say they want it he will run it.

Thanks for the heads up!

[BK7saum]

Sorry, Grmps, I haven't checked back. The 110-130 grain bullets are a couple that I shoot. The 110s are sierra 30 carbine jacketed hollowpoints. They are similar to the 38 special with exposed lead hollowpoint. The 130s are the MP 311410 cast with 50/50 or range lead with deep hollowpoints. They will open well in tissue subsonic and I have killed a few pigs with them. Recovered from a soft dirt berm, they open all the way to the hollowpoint and don't shear the nose. I have been very happy with that 311410 mold.

[dragon813gt]

Thanks for the heads up!

I edited my post because I forgot to put five people are needed for him to run a batch of molds.

[308Jeff]

I edited my post because I forgot to put five people are needed for him to run a batch of molds.

Thank you again.

[Herb in Pa]

http://castboolits.gunloads.com/show...-BLK-and-WW231

[Grmps]

300 AAC BO factory loaded brass is all over the board, what's up with this???
1.3445
1.347 lc
1.349 fc
1.3515
1.352 lc
1.353 xx rp sig
1.3535 xx sig
1.354 xxxx sig rp lc
1.3545 xxxxxxxx sig rp
1.355 xxxxxx
1.3555 xxxxxxx lc gemtech rp
1.3565 xxxxxxx lc lp
1.357 xxx lc
1.358 xx lc
1.36 lc
1.3615 lc
1.3625 lc
1.364
1.3655
1.367
1.368 s&b


I think I'm going to stick with converting my own from 223. they are ALL 1.360.

Spell check doesn't help if you misspell a word with one meaning and spell a word with another meaning

[308Jeff]

Here's your chance to get your hands on them: http://noebulletmolds.com/NV/index.p...i48mv1lrgq78h4

Just completed the run and made available yesterday, if you want no lube groove. These will be gone quick.

It was actually the 311-198-SP that I was wanting to get, but I should probably jump on one of these...

Thank you!