Comments on HOT 7mm\'s I'm tinkering with theidea of a LR rig and a hot 7mm was in the mix , called a couple old hunting buddies that I haven't talked to in several onths and one said that hes doing the same thing with a 30" barreled Wby that was a 30-378 making a 7-378 pac-nor has the reamer and is doing the work. His plan is to get a 180gr Berger VLD to 3600fps , I personaly don't think that is possible but maybe 3400 maybe more Anyway I asked why not just a 7RUM or 7-338Imp but he is looking the most he can get. Anyhow , what would the velocity differance be between the regular 7mmRUM and a 7mm-300RUM , is their enough differance in the case to warrent the extra work. I was also thinking about a 7mm-300Dakota Hell who knows maybe the 300RUM with a min cut chamber will be the best bet. The rig would be for deer and elk out to 600-800yds but with as little wind doping as possible thats why I was thinking about the long 7mm bullets What do you guys think?