Originally Posted By: Sqeak'emCatshooter, Could you tell me the correct way? The 223 that I am loading for is an AR so has to be full length sized anyway. But I would like to know the best way to size for my 22-250 bolt gun.
Sure Squeak'em.
Try one of your own fired 223 cases in your AR... see if it will chamber and the bolt go to fully lock, and then the bolt unlock and extract easily without drag.
IF so, set your FL die so it is one turn ABOVE the shell holder when the ram is up - size the neck, load a few and shoot a few - check these with the above chambering test and see if the cases are tight... at the point when your cases are a little tight to close, or resist the bolt opening, THEN you can adjust your FL die.
Screw it down a tiny bit (1/40th of a turn) and lube and run a case into the die and try it - keep doing this until the bolt unlocks smoothly, and there is no drag. Then lock the FL die in place.
Gas guns can be very hard on cases, and life for those cases can be short - this way, you will get the maximum case life (which might be important, the way politics and the scarcity of .223 brass is going).
For the 22-250, do the same as above, but you might not ever have to deal with tight cases.. but if you do, do exactly the same as you did for the 223.
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