Perhaps, but the Guilandi is 492gr. a conical lead, no plastic, alloyed lead, shoots very well and is running 1,610fps. It will not have expansion problems.

http://www.cabelas.ca/product/1829/challenger-magnum-rifled-slugs-12-gauge

This is the Gualandi - the first one. It is the slug that Challenger is loading in Canada.

http://www.gualandi.it/en/products_slugs/borra_proiettile.html

For me, the accuracy was as shown from the rifled tube. I also tried some of the sabot rounds. they were very expensive and I was not impressed with their accuracy - at all, from my 12 bore rifle.