I recently interviewed Tom Roster on nontoxic shot for a couple articles in Pointing Dog Journal/Retriever Journal. Here's Tom's comment on steel shot in tight chokes:


"It is true that the more open the choke, the less likely there will be integral choke or choke tube expansion damage from hard shot types passing through them. But the fact is, if an integral choke or choke tube is made of proper steel with proper wall thickness--such as, for example, Beretta, Browning, and Remington factory chokes and many after-market choke tubes--hard shot types can successfully pass through choke constrictions tighter than modified without any choke expansion."