I first read abbout the 6.5/300 WTHBY for 1,000 yard shooting in a handloader magazine article in the 700's and it intrigued me then
That cartridge would have to bee doing some crazy velocity to be 1.5 high at 1000 and 1.5 low at 300
I have experimented with some pretty large cased 6.5's as well as small cased wildcats and just tried to get the same trajectory on my computer- couldn't do iit.
Can you talk to your buddy and find out what he is running foorr components for me?
I may just build another long range plinker!
Cat