So, I just got a Ruger SP101 in .357, and I want to load some stuff up that really gets proper .357 ballistics, with an eye toward maximizing their power out of my grandpa's .357 carbine. I did some research, and I landed on 158gr Hornady XTP's with 16.7gr H110. I worked up the load just fine and wasn't seeing pressure signs of any sort, but I felt a stinging on my face when shooting, that I didn't feel with my practice loads (using Bullseye and IMR700X). I figured it must be shaving lead, and some small fragments of copper embedded in a legal pad held to the side of the gun seemed to confirm this. I contacted Ruger and sent it in, and it came back to me with a much smoother extractor rod (they must have replaced it) but no noticeable change in lockup, and when I shot it again today, I felt the same stinging on my face. I didn't see copper flecks this time (though they might still be there) but there were dark speckled of unburned powder, so I'm thinking maybe that unburned powder is spraying back at me. I want this load to be safe to shoot without safety glasses, so I'm thinking of trying a different powder. I hear Lil'Gun has the ability to get maximum power out of the .357, so I'm wondering about trying that. Anyone else have a better idea, or something I can do to fix this spraying problem? The gun is a 3" Ruger SP101, for reference.