I reload 1000's of rounds of both 32 & 38 S&W for my top breaks... Trailboss is my most used powder... I have 3 load levels for both 32 & 38 S&W...
these are my 38's... ( a couple bigger bores mixed in on the bottom ) all of these guns have been fired with Trailboss... & yes, the pressure curve "can" be higher, but the powder is safe with lower charge loadings, than most any other powder... so if I want a "hotter" loading, I use other powders, but if I want a lower power loading, like I have a revolver check out load that uses a fraction of a grain of Trailboss, & a soft lead round ball ( much less powder than I'd feel safe with any other powder )... this load is safe in any gun that times out ok...