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