Just picked up a custom 6.5 rem mag built by Randy Selby. Gun is built on a remington ti action and has a 23" barrel. Weighs in at less than 6 pounds. I have no experience loading this caliber my loading exp limited to .270 and 7 mm stw. Was hoping to shoot 130's out of it. Any ideas would be appreciated. Gun will be for packing in after blacktails ranges from 100 to 500 yards