I have shot about 1000 loads of Trailboss -
5.5 grains under a 200gr LRNFP for Cowboy Action Shooting. Gave me a muzzle velocity of about 715 fps.
I was using Titegroup - but at such low charges, I was getting inconsistant ignition.
So far, I am very happy. The rounds are consistant, and clean. Recoil is very mild - which is good for Cowboy Action.
Gonna stick with it. Only problem is cost. Local store here sells it at $11.99 per 9 oz. bottle. So it works out to about 35% more expensive than using TG or Unique.
Would only use this stuff for shooting very light loads - otherwise other powders fit the bill just fine, at much lower cost.