cci shot capsules using trail boss powder

[tree rat]

I want to load some cci shot capsules, with #9 shot, in .357 mag brass, any reason not to try trail boss for this? I want to use these in a Bond arms derringer. hodgdon told me I could use a full case of trail boss in other cartridges (.460 & .500) as long as I do not compress the powder.  that is why I think this should be ok.

[stimpylu32]

I see no reason for this to not work , fill one of the shot caps and weigh it , then use the TB data that matches that weight .

stimpy