In my quest to lower reloading costs, I've been looking at different types of bullets out there (I don't even want to think about casting right now). The ones I have now are JHP's with a cannelure, and that pretty much gives me the depth to seat my bullet. I've seen some plated bullets out there along with lead that don't have a cannelure. How is bullet seating depth determined on those? Is it a matter of trial and error all while staying within specs? For the record, I'm working on 38/357 rounds. My other question is about crimping on those plated and lead bullets. My Lyman manual suggests a roll crimp on revolver rounds. Would you still use a roll crimp on those bullets without a cannelure? Thanks for the info. fellas.