[Rico567]

For something like the .22-250, I'm assuming you're shooting varmints or targets. I can't see any reason why anyone would want to crimp this round. Crimping, to me, is dependent on a combination of:

1) how heavy the recoil of a particular round is

2) what type of magazine is being used

3) what type of action

4) a few cases where the powder manufacturer specifies a crimp

Heavy recoil may produce movement in subsequent bullet in the magazine. A tubular magazine always mandates a bullet crimp, for obvious reasons. Autoloaders such as AR-15, Garand, etc. should be crimped. There are fairly rare cases (I believe Winchester 296 is an example) where a powder manufacturer specifies a heavy crimp for proper propellant combustion.

Hope this helped....like a lot of questions in reloading, this doesn't really have a simple answer.