I have been shooting my 788 in 7mmo8 since 1984 I also have 6 other 788's in different calibers. The only ammo I could never get to shoot good was the premium stuff.140 gr remmy or 140 gr Winchester always shot great. I reload for the old girl now and I can't make a bad load. This leads me to believe there is a problem somewhere. A dirty barrel has sold more guns than Obama becoming president! Make sure the barrel is clean and I mean clean .Take it to a gunsmith and have him scope the barrel to see how clean it really is.
Shiny bore means squat. Copper is shiny and that's your enemy. Get some good copper remover solvent and start scrubbing.
Last edited by 7887mm08; 11/22/17.
