https://rogerssportinggoods.us1.lis...1d554&id=751d7ab220&e=c38ed70cdfRight now Rogers sporting goods have their Federal Heavyweight Magshok loads (HW15) on a truckload sale for 14.99 a box...
You can either buy them and use them straight or, unload them and use the shot in a duplex load.
The cost is close to the cost of the shot alone, I get 10 gauge (I have a 10) so 2 oz per shell isn’t bad.
IIRC weight per oz
TSS = 18
HW 15
HW 13
Lead = 11