The Model 21 would be a lot better Skeet Gun if it was WS-1 in both barrels. I have seen one so marked. WS-2 is really way too tight for NSSA Skeet. In my 1953 vintage 12-gauge Model 21 Skeet Gun the WS-2 choke measures .015".

I misspoke in my earlier post. That inch and a quarter flare is in the Skeet Cylinder barrels of my Savage-era Ansley H. Fox Skeet & Upland Game Guns. The flare is nearly twice as long in my 12-gauge Model 21.