I had one that looked like it had been through the Indian Wars it was so beat up in my earliest days of yote hunting and jack rabbit sniping.
I shot a load of Win 760 and the 60g Sierra HP, velocity was right at 3700 fps and shot less than 1/2" in mine.
243's are notorious for case stretch on close to max loads, and Jack is right, there is some bolt flex on Max loads that you would not see on a cartridge like a 222 and 223 in the 788.
RCBS X dies that eliminates case stretch on full length sizing would be the first item that I would buy after a scope. No doubt, the 788 is one whale of an accurate rifle in 243. Replace the trigger spring with an .068 ink pen spring and you have a wonderful trigger to boot. Bed and free float the barrel and you should expect 3/8" groups(keep the copper out of the barrel).
I shot a load of Win 760 and the 60g Sierra HP, velocity was right at 3700 fps and shot less than 1/2" in mine.
243's are notorious for case stretch on close to max loads, and Jack is right, there is some bolt flex on Max loads that you would not see on a cartridge like a 222 and 223 in the 788.
RCBS X dies that eliminates case stretch on full length sizing would be the first item that I would buy after a scope. No doubt, the 788 is one whale of an accurate rifle in 243. Replace the trigger spring with an .068 ink pen spring and you have a wonderful trigger to boot. Bed and free float the barrel and you should expect 3/8" groups(keep the copper out of the barrel).