Yep, he's great. I got his IBOKs for both the Security Six and GP100. Elsewhere he gives a detailed discussion of the hammer step mods, but I'm reluctant to have additional work performed-at least at this point-when I suspect the primary causal factor is inherent to the primers/their manufacture/their QC (or lack thereof...).
I may discuss with Ruger/my gunsmith, but given the attention to detail he lavished on my GP100 when he performed the custom work on in in 1998, I'd be surprised if Chris Peters hadn't performed the step optimization; my gunsmith recently pointed out the beautiful subtle beveling he did on the hammer front edges, something I never noticed.
Best, Jon