I've got a .338 rum on a Rem 700 action in a h-s stock with a 27" kriegger barrel. I intend to use it on deer, and antelope out to 7-8 hundred yards. I picked up some sierra and hornady 250 gr match hp bullets. I noticed the meplets don't look real consistent. Should I plan on uniforming for the beginning, or is it a waste of my time at those distances?