Something fishy there. I’ve run 48+ 8208 with 180 Accubonds, 180 BTs, and 180 Woodleighs in multiple 338 FEDs with no issue. I run ~47 with a 200 NorthFork. Can you try some factory ammo to confirm there are no issues? Check powder scale? Bullets aren’t seated into the lands? Just tossing ideas out there. I have not tried 2495.
Edit: finding accuracy with the 180 AB has been unusually difficult for me. Finally found something that seems to work well using Benchmark. ~2775 FPS IIRC.