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Different .22 Chamber Dimensions

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:confused: I have seen reference to different .22 LR chamber dimensions such as match or target, and I see that there are different chamber reamers available in .22, but can anyone tell me the actual difference?

Also, what sort of chambers are found on Remington rimfire rifles from the factory?

Do their target grade rifles like a 37, 40X, 513T, 541X, have a different chamber dimensions than other non-target rifles?

Is match or target ammo better suited to certain chambers?

Have these chamber designs changed over the years?

I have a later 513T which is marked to take short, long and long rifle ammo, yet earlier ones I see say only long rifle. What changed? Are the earlier chambers more "target"?

Thats a bunch of questions, but thanks in advance to all. ezb
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