JB weld works good anywhere you can block and fill everywhere it can run. Rifles like the M1/M14/Mini14 are a little more difficult to bed with JB. Bolt actions are great for JB. Use plumbers putty to fill all the voids, paste wax makes a great release agent. 2 years later my Howa is still tight and requires a little force to remove from the stock. So all the talk of shrinkage means very little to me. Just my experiences.