Guys I have been really been holding off on starting my new rifle build... and I guess I'm doing it b/c I'm having trouble deciding on a caliber. I had a 7mmRUM sandero that was stolen.. so NOW I have over 100 new brass and probably 50 once fired cases, along w/ only one box of 7mm 180 gr bergers. and about a pound of retumbo, 3 lbs of imr7828 and a set of 7mmRUM dies. SO I want to lean toward the 7mmRUM... BUT I keep reading such good things about the 7mmRUM, 30-378 and even the 338 rounds. I probably wont be shooting @ game over 800 yards and mostly and rather often between 400 and 600. BUT I do want to be able to shoot on out to 1000 @ deer. I wish there were heavier bullets for the 7mm but 180 is the heaviest I have found, but at the same time I've read on several occasions that the 300RUM is a way more effecient round. Guys help me steer in the right direction!!! How can I make up my mind on what caliber to go with???