Originally Posted by jpbaker
Not sure what a Go Gage is. But, is it possible that some bedding compound did get into the chamber. It appears to be clean. However with the edge/axis the recoil lug is bedded into the stock, and the barrel nut is notched for the recoil lug, and the barrel threads are visible. So im wondering if compound found its way into the chamber somehow....
Like I said it appears clean, but....now im starting to wonder.....
Barrel nuts are seldom notched for recoil lugs. Something is either not right or you aren't understanding what you are looking at. Is this a Savage? If so, you may have a simple resolution but you will need a go-gage.
A Go-Gage is the gage used by a gunsmith to determine if the chamber is the proper depth. If the chamber is too shallow, headspacing too short, you would have the symptoms you are experiencing.
Headspace gages come in two flavors for the .30-06. The Go Gage which should fit in the chamber with the bolt closed, a No-Go gage which is a few thousandts longer and shouldn't fit in the chamber with the bolt closed.
The Go-Gage is a precision ground solid steel gage that is inserted in the chamber like a cartridge. They are not expensive. This one should tell you if the chamber is undersize or not, and it's in stock: PTG Headspace Go Gage 30-06 Springfield, 25-06 Remington, 270 Winchester, 8mm-06 Springfield, 338-06 A-Square, 35 Whelen - MidwayUSA
When the obvious mechanical possibilities are exhausted, an undersized chamber has to be ruled out, especially when the problem happens with factory ammo. The Go-Gage is the tool that will give you that answer.