Yes, there is some burring on Hevi-Shot, which gives it a tear drop shape and which is the reason it patterns better than steel (i.e., it is more aerodynamic). Originally, I heard the same thing, but it must not be an issue because I have not heard about HEvi-Shot being sued or barrels being ruined. I use it and the bore in my SBE still looks nice and shiny. I am willing to bet that they use a rather thick wad to protect the barrel.
I think the bigger problem is when handloaders make loads out of Hevi-Shot and do not adequately protect the bore from the pellets.
In my opinion, Hevi-Shot is way better than steel. I have killed ducks and geese with it that I never would have been able to kill with steel, and they come down stone dead. Good luck with the new SBE II.
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The pond, waterfowl, and yellow labs...it don't get any better.
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