Weatherby Long Range Steel Choke

[Elmer Fletch]

Can someone educate me on this choke please? It came with my Weatherby Element. Looks like a modified choke with 3 notches. Is it safe to shoot BB's through this? Has anyone used it on ducks, geese etc... pics attached

[Henrydog]

As a general rule of thumb a modified for lead, is full for steel. All manufactures will say never go tighter than a mod for steel.  So this is likely just simple marketing for the uneducated masses.   I think Weatherby uses the Beretta thread pattern.  BB should be zero issue