JB weld's info
Tensile Strength: 3960
Flex Strength: 7320
Tensile Lap Shear: 1040
Resistant to: 500° F
Devcon 10110 info
Compound has an adhesive tensile shear strength of 2,800 psi and a Hardness 85 Shore D
So, JB claims ZERO shrinkage, which is impossible, but for the layman close enough. The devcon has a higher shear, and not seen is Devcon steel is also harder than JB.Devcon has a slightly better shrinkage number, but I don't have the info to post.
Is JB probably plenty good, I'd say yes, and chemically it is good for all gun solvents sans MEK, which both will be softened by.
BTW, epoxy is not all the same, many are terrible for gun applications, usually either too soft or too hard, and shrinkage is Brownells advertising method of suggesting their bedding compound is the best....and there are many poor epoxies for bedding a rifle.
I think Va'S gun will never know the difference.