From my experience, 7 hours is too short a time for epoxy bedding materials. A minimum of 12 hours and preferably 24 hour is needed to avoid the problem you describe. I've had the same problem with JB Weld staying soft for longer than other epoxy products. I prefer Devcon Plastic Steel Epoxy from the local hardware store for this reason. At this point, I would remove the bedding material and clean the surface with acetone. I bed at least 1/4" in front of the recoil lug. I wrap the barrel nut with 3 layers of tape to float the barrel nut and apply kiwi sp. With the current Savage factory synthetic stocks I now bed in front of the recoil lug and under the barrel nut out to the tip of the barrel nut filling the first stock well to eliminate/reduce flex in this critical area. I assume you have an Axis recoil lug? Coat the recoil lug with kiwi and bed it front and back in the stock. You want to be able to remove the recoil lug in the future if you change stocks. Put tape in the stock in front of where you want the bedding to stop. Then add some a strip of plumbers putty to act as a dam so that the bedding material does not flow past that point. Or if it does, it is easier to remove by scoring with a razor blade and breaking off to form a clean line.
The picture below shows the first and last bedding job I did with JBW. I had the same problems you experienced because I did not wait at least 24 hours. I had to remove and redo the bedding job.
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