So the girlfriend has bro. Wants me to come out Colorado. 300 yd longest shot he has taken should I get a 7 mag or just take the whelen?
The Whelen should work great. I'd load it up with a 225g AccuBond or Partition.
My longest shot was at 487 yards with a .338WM and a 225g AB, MV 2742fps. You should be able to get close to that MV. The AB worked great.