Thanks for the info. My Rem 700 308 has a 1 in 10 twist and I shoot 180s in it and a Rem 40X 300 win mag I shot the 200 gr accubonds in it out to 800 yds. It also had a 1 in 10 twist. It would not suprise me if the barrel is worn out. Considering the fact how old it is. Have shot deer with the 200 gr accubond in the 40X and also took deer with a 150 gr BTHP out of my 300 Wby.