I am new to Glock reloading but not reloading other pistols and rifles. When I read data in the 10mm forum I notice many like hard cast bullets. Along with the upper velocity ranges in a 10 is there a problem with leading? Are the cast bullets hard enough that leading isn't a problem? When casting one's own bullets what hardness do you look for? Finally is there a favorite solvent for barrel cleaning? Thanks for the look, I realize there are a lot off questions so thanks for the time.