I have searched this forum for an hour, sorry I'm a newby on the forum. I was hoping to chamber an 8 twist proof, carbon barrel in 7 RSAUM and screw in on a Bighorn origin short action. It will be a lightweight hunting rig, probably for 175 grain Nosler ABLR bullets, because I have several 100. I could switch bullets if need be but I would like to shoot at least 175s. The plan is to magazine feed and may go with a Wyatt's box to seat as long as possible. Does anyone have any real world experience with a similar setup and if so, what freebore reamer did you go with? I have seated a ABLR bullet to several seating depths to try to see where the junction is but I have not received the Wyatt's box yet so I don't know my exact seating depth. If anyone has experienced a similar scenario, I would appreciate your thoughts. I already have a couple hundred pieces of 7 saum, Normabrass, a proof barrel and an Origin action (just have to get a magnum bolthead).