fish- I have only made 338-06 and 375-06 Ackley Imp. from 30-06 Nickel plated cases, (Win. and Rem.), both worked fine, no flaking, ect. after numerous loadings. Two things I like about them are that they are different colored cases than standard 30-06, 270, 25-06 ect. (for ID purposes) and they are really slick into the chamber. They will however corrode (blue/green spots) if left in a moisture prone location (truck door pocket) but not near as much as plain brass cases. -Muddy