Discussion Starter · #1 ·
What does anybody know about IMR trailboss? I have a little pressure tested data that was given to me in confidence so I don't feel at liberty to reveal the source. Hodgdons doesn't recommend using it in shotguns yet it has been done & is still being done successfully. My info. shows it yields good velocity (1200 fps +/-) with modest pressure. Its main application (in shotguns) is with older guns that need low to moderate pressure & in using all brass hulls. I tested it in my nitro. proofed SXS LC Smith (not damascus) & it worked great. Moderate to low recoil & good patterns & penetration. My chronograph is broken. My main question is powder charge. I will have to dig my records for the load I tested out of my archives, which are stored in a different location than where I live. I think it was 38 gr. of Trailboss & 1.25 oz. lead shot loaded in a brass 10 ga. hull with card & fiber filler wads. The hull was machined brass & the primer was a win. 209. I believe that Trailboss is about equil to blackpowder on a volume basis. Hodgdons says you can fill any smoakless cartridge to the top, leaving enough room to seat the bullet, & pressure will be below max for that cartridge. Please verify that with Hodgdon before loading anything as my memory can be less than perfect. Anyway, it appears that "X" grains of Trailboss is approximately equil to a dram of black powder so if you load your shotgun using a black powder equivalent load (DE) of "X" times the equivalent number of drams in the BP load you are trying to duplicat, pressure will be below SAMMI max. Anybody know about this?