I highly doubt it would ruin the barrel, but I don't think you would get very good accuracy out of it and cost wise it would be a waste in my opinion.

My only real concern would be the full choke. Most slugs are meant to be shot out of clylinder, improved cylinder or modified chokes which are not as constrictive as a full choke. Most any decent rifled slug should function out of a full choke, I would again question the accuracy though. The rifling on the slug is actually there to crush as it goes thru the choke at the end of the barrel. It doesn't really make the slug spin like most people think.

Sabot slugs are meant to be shot out of rifled bore with no constriction at all. They will not crush when the reach a constriction at the end of the barrel. So there is a possibility you may damage a full choke barrel shooting sabot rounds out of it. I personally have never heard of it, but I don't work in a gun store. Just because I haven't seen it doesn't mean it can't happen.

I would suggest you buy several brands of rifled slugs and experiment to see what groups best out of your particular gun. No sense spending more money on fancy slugs if cheaper ones group better. The ballistics will be fairly simular for all of them in most cases.

My opinions any way.

Paul