Hodgdon offers some specific recommendations on their site for using Trailboss in rifle cartridges.
https://www.hodgdon.com/wp-content/uploads/2018/12/trail-boss-reduced-loads-2018.pdfFollowing is from their website
Listed below we show a few examples of rifle loads throughout the Reloading Data Center, but the fun doesn't stop there. If you don't see Trail Boss data for your favorite cartridge we have a formula for developing loads for all cartridges and it's simple to follow. This formula may be used in both rifle and pistol applications:
1) Find where the base of the bullet to be loaded is located in the case and make a mark on the outside of the case at this location. Then fill the case to that mark with Trail Boss, pour into the scale pan and weigh. This is your maximum load. Pressures will be below the maximum allowed for this cartridge and perfectly safe to use!
