I have a NWTF long tom single shot 12 gauge. It is color case hardened and stamped with the NWTF logo. Is this considered an H&R? Barrels swap out ok to a SB2 receiver. Also a pardner 20 gauge will fit on the W&R. The W&R receiver looks like an sb1 except it has a smaller firing pin than the Pardner, but bigger than the SB2. Would the color case add strength to this receiver, or just for show? If stronger could it be used for 45 long colt orig loads and 38 spec.?