I have owned several Valmet 412s in rimless caliber and they do not extract well. I have 9.3X74R DR barrel set and a combo gun in 7X65R. it works much better on rimmed cases. You could get an extractor for a .223 and open it up to accept the case rim after recutting the rim rebate. Incidentally, the 30R Blaser was developed to rechamber drillings chambered in .30/06 that don't extract well.

Last edited by Vol423; 01/15/16 09:49 PM.