I own a Redding Competition Bushing Style - Neck Sizing Die for the 338 Rem Ultra Mag. Is there any reason I couldn't use this 338 die with the appropriate neck bushing for neck sizing a 25 RUM? Same basic cartridge case necked down to .257? I've tried contacting Redding by phone (no luck) and by e-mail last week, but so far haven't received any response. Anyone tried this or done something like this with a Redding bushing style neck sizing die? Like maybe using their 338 RUM die with neck bushings for the 300 RUM or 7mm RUM? Conceptually I don't visualize any problems. The casing should still be pretty well centered in the sliding sleeve, no?