Re: Contender carbine in .22 Mag?
Knifemaker, you are right. The .22 Mag has the same bore diameter as .22 centerfire barrels. The reamer pilot diameter is .218". Pilot diameter for .22lr is .216". I talked to several people after doing the first one, which I screwed up. The consensus is that .22 Mag chamberings in .22 lr bores are safe and frequently very accurate.
I have verified the safety, but not the accuracy. I fired (2) five shot strings late last week, doing barrel break-in, neither of which were very accurate. 1 moa to 1 1/4 moa at 100 yds. I still have 4 more types/brands of ammo to test, so am not discouraged yet. If the barrel doesn't shoot any of them well, I'll rechamber it to .22 K-Hornet and try again. I have a.216" pilot for it also.
I didn't follow up on the thread sooner because I haven't had a chance to shoot it. I plan to just take a couple of rifles to the range and give them a good test, including chronographing velocities. When I know more, I'll do a better job of updating.
7mmSendero, I've just started follow-up testing on a Marlin 917VS after doing some badly needed stock and trigger work on it. So far, it's not very promising either.
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A big fast bullet will beat a little fast bullet every time