did own a Mossberg 800 years ago that had an ER Shaw barrel on it, nice bluing very accurate for being on a mossberg action with an atrocious trigger. not bashing Mossbergs, just that 1 had a trigger that you pulled, and pulled, and pulled and then took your cheek off stock wondering "is this ever gonna go off?" the barrel I had was a 358 Winchester and like I said very accurate.