I have a Ruger Vaquero in 45 Colt. I keep it meticulasly clean and had the chamber throats opened up to match the bore. All my brass that I reload is within specs. Problem: when cocking the hammer the brass rubs on the recoil plate sometimes to the point of stoppage. There is also alot of sooty blowback on frame and cylinder. I reload using H-110 mild loads. Any thoughts?