Don't dismiss it completely, many here shoot .357 Mag barrels (not Max !!!) on shotgun frames and some shoot .223 barrels off them also, at least one here shot his 45/70 barrel off a 12 gauge for quite a while until he found out it was not the best thing to do (I won't mention you name buddy
). Firing centerfire rifle barrels off of shotgun frames is not approved by the company but done with care and if not using excessivley hot loads in properly fitting frame/barrel combinations I myself have done it and see no major problems. One problem sometimes encountered is pierced primers or metal from the primer flowing back into the firing pin hole, this is a result of the larger firing pins and firing pin holes on shotgun frames. I do suggest you either check the H&R/NEF list of accessory barrels to see which barrels (calibers) are what they call high intensity calibers, those marked with an asterick in the list. You could also run any possible caliber by the group here, since there are occaisionally errors on the H&R site. Better still do both, someone here is bound to have made any mistake or gone through the throws of what you plan already and will most likely be willing to offer an opinion or some expierence, and everyone here knows there is no shortage of opinions on this site, opinions here are challanged only by the amount of available expierenece. Jusdt think, if H&R/NEF would just listen to the guys here they would double thier business in just a couple of years. As far as the chamber adapters go the 9mm, .22 LR or .22 Mag are all fine and are safe in any H&R/NEF shotgun, your good to go with them if that is what you want to do, but I myself find them to be a pain and after a while not worth the trouble, oops!, there is one of those opinions!!!! Best of luck and please keep us updated on what you do, by sharing we all learn here, Thanks....<><....
