I ran the numbers on the 5/8 ounce BRI 20 Gauge sabot slugs at 1,400 fps and it appears that they should produce the same approximate level of performance as the 45-70 405 grain factory load. Few hunters would think twice about shooting deer with the 45-70 405 grain combo, but don't think highly of shotgun slugs.
I am looking at buying a rifled barrel for a Mossberg 500 that a friend's son is shooting. The boy is currently shooting deer with a smoother bore barrel and Foster style slugs. The shotgun he is using has a vented rib with a bead front sight and it appears that he has hit multiple deer, but recovered none of them. I don't have any experience with rifled barrel shotgun, mostly Brennekes, and would like to hear back from people who have experience with the 20 gauge BRI style slugs on deer.
