I've seen a bunch of 'um! .243 Win. stuck in a .22-250,, couldn't get the bolt closed,, then couldn't get it open! Same deal with a Weatherby MkV, 7mm Weatherby in a .270 Weatherby. Some I've seen that did manage to get the bolt closed, and fired,,,, .32 Win. Special in .30/30, .300 Win Mag in .300 Weatherby Mag, .257 Roberts in .25/06, the list goes on and on! Makes me wonder where comon sense has gone. There's a thread over on 6BR, guy has fired his rifles at the range about 100 rds. each, doesn't have time to clean them, will they be OK 'till I find time [to clean them]? Might be awhile before I do!