Okay fellas. Maybe our standards for accuracy are a little higher than most. Or maybe the way we do our sniper rifles in the USMC is overkill. But every so many rounds (can't remember exactly how many right now) our M40A1-M40A5 sniper rifles have to re-bedded. It's part of the scheduled preventive maintenance checks and services PMCS for these rifles. Epoxy and glass bedding is used for this process. I am no gunsmith and was basing my comment on what Marine Corps Gunsmiths are required to do with our precision rifles in order to maintain our standards for accuracy.

I'll ask the Sgt that works for me when he gets back from class. He's our gunsmith and he'll be able to shed more light on this.