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Old January 28, 2023, 04:57 PM   #26
44 AMP
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Note how very tapered cases in semis have very curved magazines. Works very well when designed that way from the ground up.

Fitting them into an AR type action is problematical, because the AR action requires the top few inches of the magazine to be straight up and down, not curved. Some cartridges work passably well, some don't.
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Old January 28, 2023, 05:20 PM   #27
tangolima
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Originally Posted by 44 AMP View Post
Note how very tapered cases in semis have very curved magazines. Works very well when designed that way from the ground up.



Fitting them into an AR type action is problematical, because the AR action requires the top few inches of the magazine to be straight up and down, not curved. Some cartridges work passably well, some don't.
Exactly. The tapering makes the top round lose contact with the feed lips to assume the correct attitude. It will then tend to feed low and get stuck. It is mostly resolved in AR-47 with redesigned curved magazine. But 22-250 in AR 10 is too new to have something similar. One boutique shop makes one with machined parts. It costs over $100 a mag. BCA (yeah the cheap shop) sells a Magpul .308 mag with modified follower. It is good for 5-8 rounds. Good enough for me.

-TL

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Old Yesterday, 11:27 AM   #28
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Sounds like an interesting caliber to tinker with. Itching to get an ar-10 chambering that.

Does it burn barrel fast?

Thanks for your inputs.

-TL

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The .22-250 is based on a .308 Winchester case, so the head-size isn't the same as the .223 Rem.
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