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post #1 of 3 (permalink) Old 08-24-2011, 08:51 AM Thread Starter
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Short actions

Ok so I'm aware of the difference between short actions and long actions. But does short action means all short action calibers can be used in each other? Like like a .243 in a 7mm-08?
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post #2 of 3 (permalink) Old 08-24-2011, 09:13 AM
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Yes you can use 7mm-08 in a 243 IF you rebarrel it. Being that 7mm-08, 243, and 308 use the same case, all you will need to change is the barrel. Everything else will be the same. However if you wanted to change it to .223 or another short action cartridge you will need to change the barrel, bolt head, and the magazine. In other words, you would be better off buying a new gun.
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post #3 of 3 (permalink) Old 08-24-2011, 02:46 PM
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Originally Posted by jake112 View Post
Ok so I'm aware of the difference between short actions and long actions. But does short action means all short action calibers can be used in each other? Like like a .243 in a 7mm-08?
The term Short Action simply refers to the size (length) of the action itself. You might consider the "action" to merely be a "vehicle" which transports the bullet from magazine to barrel (chamber).

As already stated, the bullet diameter varies between different caliber S/A cartridges. Any number of different calibers and chamberings can be found in a S/A. Not all would be interchangeable however, even with a new diameter barrel & chamber. Many (most) would have similar sized case heads, thus also having similar sized bolt face (where the bullet case touches the bolt)

If you were to have a SM (Short Magnum) which would fit into a S/A, the larger bolt face would preclude it's working in a typical S/A bolt rifle with a .308 sized bolt face. This causes a problem when wanting to change between a S/A in non-magnum to a magnum cartridge. Magnum cartridges have a bigger diameter case and case head, needing a larger bolt face for proper "transport".

Most manufacturers do utilize different actions for different length rounds and have both L/A & S/A sizes. But some, most noteably CZ and Tikka simply utilize a standard size action (L/A) for both their L/A and S/A cartridges. In other words a 30/06 & .270 would be housed in the same sized action as a .308 & .243. I'd suppose you could say that a L/A might give you more opportunities to "modify" to a new chambering.

Last edited by turner; 08-24-2011 at 02:48 PM.
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