Trail Boss is good gun powder for some applications. I recently loaded some light recoil 30-06 cartridges with Trail Boss for shooting 50 meter offhand vintage rifle matches. I used inexpensive General Dynamics 147g FMJ projectiles, mixed HXP brass and Winchester Large Rifle primers. I used a charge weight that falls in the acceptable range for Trail Boss published on the Hodgdon website. The Springfield 1903 MKI shot 9/16" groups at 50 meters using iron sights, off the bench of course.