Mornin folks. I have a 500, and am looking to add a 590 (heavy wall maybe) or a 930. I typically use win superx heavy game loads for critters, and win AA high velocity (1250 fps) target loads for general target shooting and as my HD round. I have some federal shells but use those far less often. Either way, the loads pattern very well @ 25 yds, no issues there. Heres the question portion; My 500 is a standard Mossberg persuader bbl. I'm adding either the 590 or 930, either way would be a spec pupose. But for slug rounds, like Hornady for example, @ nearly 2000 fps, is the heavy wall bbl needed? How much charge is "too much" for a standard bbl? The 590a1 all have a heavy wall bbl., but how necessary is it, when does it become necessary? I never did have a manual for my 500, so I really dont know how much noise is too much through the standard bbl, and if I need to consider the heavy wall bbl before going to a higher velocity shell.