Can't speak to the Sigs, but my son's Beretta 92 has had over 5000 rounds of factory and handloads through it with no degradation in accuracy. I'd never have believed it had I not done the reloading for it as well. Kept lubed, I think modern aluminium alloys are pretty tough. Rod
Our Flag does not fly because the wind blows against it,
It proudly waves because a soldier's dying breath blows upon it.
USAF Forward Air Controller, 5th Spl Forces,
An Loc, lll Corps, RVN, 69-70, Vietnam Vet '69-'73