I got a Rem 7 mm mag HS Precision stock, floated barrel and a Nikon Monarch 4 x 16 x50 scope and it shoots about anything real good. What I'm wondering is, what would be a good factory round for antelope at maybe 300 yards. Something that would make a good clean kill but not do alot of meat damage. I don't reload yet but planning to do so in the future but for now I need a good factory load for antelope. Any suggestions?