I recently read where a reloader can fill a case with Trail Boss, any case, the the base of a loaded bullet, reduce by 30% (or multiply by .7) and use that as a starting charge. Anyone out there have any experience with this?

I've used the formula a bit, mostly with handgun and straight walled rifle rounds, it works.

https://www.hodgdon.com/wp-content/uploads/2016/11/trail-boss-reduced-loads-r_p.pdf

They also have specific reduced load data for Trail Boss on their website.

https://www.hodgdon.com/wp-content/uploads/2016/11/trail-boss-reduced-loads-r_p.pdf

GSSP,

I just called my "brother of the heart" & asked him his opinion, as the "originator of The Load" & a person who has forgotten more about loads than most people will ever learn.

He said that EXCEPT for the BIG MAGNUM cases, that 70% of capacity in Trail Boss should be FINE & SAFE in a modern firearm in SOUND condition.

yours, tex

Thank you Gentlemen for this information. I had this on my things-to-do-list today.

Let the testing/fun begin!

Thank you gentlemen.

GSSP,

WELCOME, on behalf of "Little brother', who is about 240# of muscle.

yours, tex

There's another solution. Fill the case, any case, with 2fg BP.

Dan,

I've never seen any BP data for the 257 Roberts nor the 9.3x62. The two rifle cartridges I want to try with Trail Boss.

Thank you,

Alan

OK.

I've not seen such data either, but do have experience with Trail Boss. OTOH, one simply cannot put too much BP in a smokeless case.

follow the load data info on IMR's web site for Trailboss

fill case to the base of the seated bullet.......do not compress charge...

thats max load.......tweak from there......Trailboss is good stuff for cast boolits especially

in lever guns 357..44.....45 Colt

https://www.hodgdon.com/wp-content/uploads/2016/11/trail-boss-reduced-loads-r_p.pdf