YES, it is a contender. I've been playing with these since I was 16 and talked my mother into buying a Armour Alloy frame for my father. Got my first frame when I was 18 and now 15 years later, bought my first octagon barrel. Never had an octagon before, so was unsure of the base situation. Just rec'd a 5mm Rem Mag and 48 rounds of the rimfire ammo. I also reloaded 20 rounds today of the centerfire conversion stuff. Now just have to steal a base off another barrel and see how it shoots.....
I like the TC duo mount for my octagon barrels. As someone commented in another thread, it looks like it belongs. I have used weaver bases but they hang way over the octagon portion of the barrel. Some folks don't like the TC duo mount because of the lack of fore-aft adjustment of the tube in the mount. If your scopes have generous eye relief this is not a problem.
I have a couple of the older Weaver bases, I think they are a 92 and not 92A, that were made in the 70's-80's, that were made for octagon barrels. The front of the base was relieved back to the screws, making a nice looking base, but I think it would weaken the base. I would only use it on a easy shooting round.
You might find one on some of the forums classified or maybe Ebay.
A forum community dedicated to the great outdoors and hunting enthusiasts. Come join the discussion about hunting, fishing, survival, archery gunsmithing, optics, reviews, accessories, classifieds, and more!