I've had several 6-hole bases (TSOB, EABCO) installed on Contender barrels and revolvers. For some reason I've never had them installed on any of my Encore barrels which have included 45-70, 300 Win Mag, 454 Casull and 500 S&W. I'm thinking about hunting with my 12" .454 Casull barrel again this year which has always worn a 2X Leupold. I'd like to put a 2-6X Bushnell Elite 3200 on it. The increased weight of the variable scope got me thinking about whether it would place more stress on the 4-screw base. Has anyone here had a 4-screw Encore base fail?

I have a 15" 30-06 with a 2x6 Bushnell Trophy, 16" 7-08 with a 2.5x8 Leupold and 338 winmag with a 2x6 Bushnell Elite all with 4 screw bases. I've shot many hundreds of full power loads in each and not had any problems at all. The 30-06 since the late 90s, 338 winmag early 2000s, 7-08 only a few years old. Not a great number of barrels but no failures at all.

I use standard Weaver 4-screw bases. Haven't had a problem, but then again I don't shoot overly heavy recoiling rounds through my Encore.