I understand your questioniong of shooting non-saboted slugs thru the rifled barrel. BUT.

I won't be presumptious enough to question the word of folks who should, after making shotgun slugs since 1898, for "the world's most dangerous game animals"(i.e. not just pidily little deer, but things like cape buffalo, etc... real tough animals!) Brenneke.

On their website, something like www.brenneke.usa.com, they state which of their rounds are OK to shoot thru smooth or rifled barrels. I know cleaning the barrel is a bit more of a chore. But now that my gun is dialed in, it's a simple matter of 3-5 rounds before going afield, just to check zero. Then a quick clean/lube and one more shot to smooth out barrel. I don't have any complaints. My rifling sure looks sharp to me and accuracy is right there.

All I can say is I don't know anyone withg more definative experience and knowledge than Brenneke. I have went by their word and never looked back, nor been disappointed. I have never really heard anyone say anything negative about Brenneke, and I think alot of guys pushing rifled barrels have done themselves an injustice by not, atleast` trying, the Brenneke Magnums.