Trail Boss 45-70 loads

[Mike 3-4]

Hi: Wondering if anyone has chronographed loads with 350grn or 405grn with this powder. I loaded the 405grn with max. TB and got a .591 group at 50 yds. for 5 rounds. I'm looking to get 1150 velocity out of a 26" T/C barrel. THANX

 

[dwwhite]

Mike,

Don't know what your "max" is, but with 12.5 grns of trail boss under a 405 grn hard cast lead bullet I am comfortably sub-sonic out of a 22" barrel. I will be at the range early next week with a chronograph so will load some up with a range of charges and will see what I can find out for you. I'll ressurect this thread or pm you when I find out.

 

[Stinger]

You're gonna force me to get out of my comfortable chair and check, aren't you?

 

[Stinger]

Okay...

Marlin 1895 (not the Cowboy or Guide gun)
10 rounds
45-70, 405g Oregon Trail bullet
13g Trailboss
average - 1014
es - 11.43
sd - 4.79

Very accurate, but I'm not sure you can get the velocity that you want. 13g is the max load listed with the data, at least with the 405g bullet. I think you can get there with the 350g bullet.

 

[Mike 3-4]

Stinger: I loaded 13 grn TB as a max but in a phone conversation with Hodgdon the Tech said just keep the Trail Boss "below" the base of the bullet so as not to compress it in any way and create a pressure problem. I cut a section out of some brass and poured 15grn in it and then placed the bullet in the brass to see it's position which still didn't touch the base. I wouldn't think it will be unsafe to shoot. I think the 2grn increase should get around 1100 velocity.