I took my old Remington BDL, .22-250, to the range last weekend and got a nasty surprise. It wouldn't shoot any grouops tighter than 3-4 moa. It hadn't been shot in 5-10 years, but had always delivered sub-moa groups using factory ammo. I was shooting the same ammo, Rem. 55 gr. HPs, that I'd had good luck with before. I checked the screws on the base and rings; all snug. The guard screws needed to be tightened about half a turn each, but this didn't improve accuracy. I thought I was just having a bad day, but then out-shot the Remington with my Mini-14! Bizarre. The only change I can figure is that 6 years ago this rifle moved from sea level to 5,000 feet. But wouldn't stock warpage merely change the point of impact, not the accuracy? Any suggestions out there would be much appreciated.