Originally Posted By: CZ527I tend to avoid anything that requires shooting once just so you can shoot again..... Like an ai.... In cartridges that already have a less than optimal barrel life.
I like the 220 swift a lot. My partner has shot one for many seasons and I haven't seen him lose a coyote, which is saying a lot as he's a lousy shot and often hits them poorly.
Some will say you can fire form while hunting and that is very true for simple shoulder changes and whatnot. On the other hand, a massive case transformation, like 22-250 to 22-250 ai, could lead to problems in the field.
When I had one long ago better than 90% formed without a hitch but the other 10 or so were a booger.
I have fire formed MANY thousands of 22/250 AI, 6/250 AI, 6 Rem AI, 17 Ackley Hornet, and NEVER had any problems. I lost MAYBE half a dozen cases fire forming 17 AH out of a 1000, never lost any of the other calibers during a fire forming process. Fire forming used brass can be problematic. Fire forming Federal brass in any of the above is just not a good idea because the brass is on the softer side.
Gunsmiths that do not set up an AI chamber with a crush fit, can cause major issues. Also, a lot# of undersize brass used when a chamber is set up with a std go gauge can cause case splitting. Normal headspace is a normal parent case go gauge minus .004, but brass can run much smaller than that in some "culls". Lapua brass is setting a new standard, with Norma in hot pursuit.