I'm new to reloading and have a question about using H110 powder. I'd like to load up some .357's with 158 gr. lswc. I have read that it's a powder used for full powered magnums. I want to be safe, so I'm asking the experts. Would using this powder with a starting load of 15 gr. and using small pistol magnum primers be the place to start? I'll be shooting these rounds out of a Ruger GP100 with a 4" barrel. What sort of recoil should I expect?