Fast burning, large grain powder like Trail Boss

[TexasHaag]

Looking for something equivalent to Trail Boss for loading an AR .308 1:10 20" Subsonic. I don't have much experience with the fast burning powders like Trail Boss. I know it is bulky a powder.... is there something out there that works well. I would like to use Lapua 200gr FMJ Subs, or Lapua 220gr FMJBT, these are what I use in my 300BO...
thanks in advance...
texashaag

 

[Badfinger]

Checkout ACCURATE 1680® also IMR4227

I use it in my 300 BO

300 load: 220 SIERRA HPBT MK 10.9 1,085 12.0 1,263 40,075 2.089

 

[TexasHaag]

Checkout ACCURATE 1680®

Is this what you use in AR .308.... does it full cycle? what are the specs on your loads?

 

[TexasHaag]

Checkout ACCURATE 1680® also IMR4227

I use it in my 300 BO

300 load: 220 SIERRA HPBT MK 10.9 1,085 12.0 1,263 40,075 2.089

I'm planning on starting off with IMR-4227 for both the 300 and 308....

 

[Dstoenner]

I use IMR SR 4759. It has been discontinued but you might find it. It was a pistol black powder substitute like trail boss. I found it to produce tighter groups.

David

 

[Badfinger]

Is this what you use in AR .308.... does it full cycle? what are the specs on your loads?

No, I use 1680 in my AR-15 Blackout and Trail Boss in a .308 bolt gun. Accurate 5744 is also a good powder and very fast burning.

 

[db2000]

A1680 is a fine ball powder fyi so if you’re trying to fill the case not the best choice. I’ve read where when it spreads out that much it’s inconsistent. I have no personal experience except in 300 Blk, which it’s incredible for super and subs.

 

[proff49]

I've been using n320 and n330 for 300 BO bolt loads with good results. Might be an option in 308.

 

[r.tenorio671]

...although it has been discontinued, Hodgdon's "HiSkor 800-X" may be something you can try. If I'm not mistaken, it's a large grained powder that was replaced by 700-X and TrailBoss...

 

[waveslayer]

Where has all the trail boss gone

 

[Jimmba]

I use IMR SR 4759. It has been discontinued but you might find it. It was a pistol black powder substitute like trail boss. I found it to produce tighter groups.

David

Hey David , you have any loads for subsonic 308 using sr4759? Thanks

 

[tekmann2377]

Actually most of these suggestions are not very good. A powder like IMR 4227, AA 1680, etc is completely wrong for a low case fill application IE subsonic in 308 Win.

AA5744 is pretty much unobtainable.

There are several other threads about this, as well as data in "subsonic loads" sticky.

A fluffy fast burning shotgun/pistol powder is the best choice. Red Dot, High Gun, etc. They will produce the best case fill, lowest ES/SS, and are designed to burn completely/consistently at the lower pressures shotguns produce (which are just like sub loads).

I have also worked up a few subsonic loads using the Vihta N330/340 powders in 300 BLK, but not 308 Win.

None of these will even be close to cycling a 308 AR.

 

[Dstoenner]

Hey David , you have any loads for subsonic 308 using sr4759? Thanks

No I don't. I have used 4759 mostly in 30-06 1903. I run 21 gns of it and get like 1600 fps. I also use 125 gn SMK as the projectile. The only 308 I have is a M1 I rebarreled in 308 and in order to cycle the action I run 36 gn of H4995. The oprod is so slow you can watch it cycle and the shell eject if you look just to the right of the sights. I tried 4759 but it wouldn't cycle the action.

But those bolt action 30-06 are so easy to shoot and still pretty accurate.

David

 

[KYAggie]

How about Shooters World Buffalo? I’ve not used it and I’m not sure how available it is, but it might be worth a look. 5744 is good if you can find it and afford it.

Buffalo Rifle Powder - Propellant | Shooters World

Buffalo Rifle smokeless powder has a burn rate optimized for straight walled rifle cartridges. This propellant can greatly expand the utility of a hunting rifle. Learn more about our powders and propellants.

shootersworldpowder.com

 

[Dstoenner]

Another thing I did for these smaller loads in bigger brass was to use puff-lon. Unfortunately he is not in business anymore. It is a ballistic filler that keeps the powder down at the flash hole. This gives you a consistent ignition and therefore better groups. The only disadvantage is it doesn't burn so it makes things a little dirty. My bolts are OK but I have to take my air compressor to the M1 to blow it out.

David

 

[tekmann2377]

How about Shooters World Buffalo? I’ve not used it and I’m not sure how available it is, but it might be worth a look. 5744 is good if you can find it and afford it.

Buffalo Rifle Powder - Propellant | Shooters World

Buffalo Rifle smokeless powder has a burn rate optimized for straight walled rifle cartridges. This propellant can greatly expand the utility of a hunting rifle. Learn more about our powders and propellants.

shootersworldpowder.com

Great find, looks like a 5744 clone...

 

[tomme boy]

Trailboss, a 100 year old failed powder that was reintroduced by Hodgdon.