Scattergunner, Yes the 6/48's that come with the scope rails are a bit thin but usually hold OK, but they have been known to shear or strip on occasion, 8/40's are stronger. It is advisable according to my gunsmith to place some exopy on the barrel and scope rail befire tightening up the screws and loctiting them, but be careful to keep the epoxy away from the mounting screws and clean all mating surfaces of all oil and grease. Also he tells me to mount the scope rail once, do it right, and leave it on, do not continue to mount it and take it off to try iron open or peep sights (like I do). The combination of the screws and epoxy should hold. The exception would be on those of us lucky enough to get scope rails mounted on 12 gauge shotgun barrels, in my case my smoothbore and rifled shotgun barrels each have a scope rail permanantly attached using 8/40 screws and epoxy, they are correctly and safely attached..The 6/48's, especially the shorter ones needed on the thin 12 gauge barrels are not strong enough, IMHO. If the scope rail let go under recoil, it could get painful....<><.... :grin: