Sub-calibers

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Qaz
Guest

Sub-calibers Feb 20, 2004 10:30:21 GMT -5

Post by Qaz on Feb 20, 2004 10:30:21 GMT -5

There is something about the sub-calibers (17 and below) that rouses my interest. Can someone explain the difference between a 17HMR and a 17CCM and why a 17CCM can shoot a 20gr bullet at 2650fps and a 17HMR can only do it with a 17gr bullet. It is my understanding that the case capacity of both is the same since the CCM was based on the 22mag case.

Thanks,
Qaz

muck
New Member

Southern Ohio

Posts: 6

Sub-calibers Feb 25, 2004 22:35:16 GMT -5

Post by muck on Feb 25, 2004 22:35:16 GMT -5

Qaz,
The 17CCM is a necked down 22CCM.
The 22CCM is in no way a 22Mag. The CCM stands for Cooper Centerfire Magnum. The case is a proprietary centerfire one. The dimentions of the case are noteably different.
These should help explain the velocity difference.

muck