needs to be an sb2 receiver, no matter what the serial prefix is....
check the FAQ's for instructions on tell'n the difference in sb1 and sb2 receivers.
and pay attention to early model information also......
n or before, are factory chamberings only......centerfire or shotgun
in the original h&r days, they did not designate sb1 or sb2. semi-skeletonized receivers are kinda touchy..... i have several but only use them on low and medium pressures.
i have found a few high pressure chamberings on sb1 receivers in pawn-shops before.
after explain'n this to the owner of the shop and showing him this website, its all good now.
they were parted out.