I want to ask you about the M77 Mark II Frontier line.  
I was offerred such a rifle in .243 the other day and I'm gonna testfire it in a few days.  How does it handle long distances with that short barrel?  Is there something I need to know about them in advance?
This one is fitted with a Bushnell Banner 6-18x50.
Also, have you tried this 58 gr. bullet in a .243?  I'm curious.  Nearly 4000 fps., I am told!