ive had many partitions and accubonds work very well in other calibers. im beginning to loose hope these bullets for this caliber.I never had any luck with them in a 338 Edge which I found odd because many other calibers and cartridges loved the ABs and were very accurate for me.
i have yet to try another box but can as i bought a bunch of them. im using retumbo and was thinking of seating to .010 away from the lands instead of .020 which im at now. maybe even dropping my powder charge to 90 from 91I am shooting the 300 Accubond .010" away from the lands out of my 338 RUM using RL-33 and getting consistent 1/4 MOA accuracy at 2780 fps.
Generally speaking Accubonds have always shot pretty well out of all of my rifles, but I did get a bad box of .308 210 ALR's that would not shoot better than 1.5" out of a proven 1/4 MOA 300 win mag.
Have you tried shooting a different box/lot of 300 Accubonds?
i have tried .040 and .06 away from the lands and those results were much worse. im starting to wonder if im running in circles here and have a fouled up barrelit might be worth trying the Berger Bullets seating depth test , I wouldn't be surprised if for whatever reason they may want more jump than you have tried so far
i have yet to try 200 + yard with these loads. i will if i can cant get anything better then what im seeing now.maybe, I load at least 6 different accubond weights including the 338 300 gr in 4 calibers, 10 different guns and all have been fairly easy to get under moa most well under for three shot groups , have you tried shooting at 200 yards ?
im running a 1/9.3 twist which from what i understand is perfect for the longer bullet.I was thinking that possibly they need some room or yardage to stabilize since they are a long bullet but honestly I really have not seen that with my savage 338L, you might have to get it checked out or try some different bullets some guns are finicky on what they like I guess I have been lucky to have not seen that much ,other than shooting bullets that were not correct for the barrel twist in a couple of guns