I have used the 45 colt, 200 grain, 357 125 grain, 44 mag 200 grain all at low speed plinking load. I have no problems as of yet in there use. All loads at around 850 to 900 by the reloading books. I dont order over the internet so I buy local , its what they have its what i use. No leading in marlin 1894 357 that I can see, 25-2 s& w revolver,very good need to use 454 size bullits to get great groups,. Loads well 44 marlin 1894 none. I will continue to use them . Loads well , nice uniform bullits