My Buckmark has been reliable unless I try to feed it the higher power loads such as the CCI Velocitor.
I have had a couple Ruger MKII' s and shot approximately a jillion rounds through them, to the point the late Austin Behlert commented he had never seen some of the components I wore out, worn out. The Rugers flat out run. There are more aftermarket parts for the Rugers as well. I regret not currently having one/a bunch, and intend to rectify that as soon as I can relocate to America from Maryland.