Shooters Forum banner

Trailboss powder loading formula

22291 Views 16 Replies 9 Participants Last post by  Lane
I was on another forum and there is a bit of a disagreement on the loading of Trailboss powder. IMR load data shows a max load for 45 colt of 5.8gr at about 12,700psi with a 250/255gr bullet. Also on IMR website (same site as load data) there is a couple paragraphs describing how to come up with "your" reduced load using said powder. This is accomplished by determining the space your bullet occupies in the case and filling the case with powder to that point. (NO COMPRESSING) weigh this amount and this becomes your MAXIMUM load. Use 70% of this amount for a start load and work up toward your max load looking for the most accurate loading for your gun. My measurements are: 45 colt starline brass, 255gr Lee RNFP, I can get 8.5gr of trailboss up to bottom of bullet with no compression, this would be my MAX load, 70% of this is 5.9gr as a start load. As you can see this is over the max load info of 5.8gr. in the load data. WTF over..:confused: anybody got an answer for this one?? Don't say call Hodgden, tried that, they ain't talkin..Another question, if the 5.8gr. load has approx the same pressure as say, 8gr. of Unique why is the recoil so much less? Seems like every time I increase pressure in a load the recoil factor goes up...I may be sly like fox, but I'm also smart like tractor..
1 - 1 of 17 Posts
I have the article from Handloader #265-was a late fall 2010 publication(they don't put a month on the mag like most-just a number).
Titled-Reduced Rifle Loads with TRAIL BOSS by Charles E Petty.

The author had info about Trail Boss (TB) indicating it was for cowboy action shooting-PISTOLS and wanted to try it in RIFLES. He says a call to Hodgdon employee Ron Reiber told him to go ahead "jump in w/ both feet" - cast bullets in most old 'dash' cartridges-ie 32-40, 25-35, 35-55 etc. Another call to Hodgdon and the author asked about TB in CF w/ jacketed bullets. No one could think of a reason why it wouldn't work.

Quote from article ""Fill the case to the bottom of the bullet and weigh it. That is your maximum load. Then take 75 percent of that and that is your starting load. Cant get in trouble that way"" said Reiber.

The author emphasizes not to COMPRESS Trail Boss at any time.

Check w/ handloader at and see what else they say.

Interestingly-Trail boss comes in the same black plastic 'jar' as other one pound Hodgdon powders. The 1# jars are only about eighty percent full. Nine ounces of TB nearly fills those plastic 'jars'. TB looks like little Cherrios.

Try it-you may like it.
See less See more
1 - 1 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.