Originally Posted by Bugger
I had the hammer spring modified on my Miroku’s hammer spring. The guy volunteered to modify it. He claimed that the rebounding hammer sometimes would not hit the firing pin hard enough to reliably fire the cartridge. I don’t know about that, but the guy swore up and down that was a problem.

I've read that, and have yet to experience it. Maybe someone had a really hard primer or something. Never experienced it in my Winchesters, nor my Sig Sauer pistols that have rebounding hammers.