Yep 600 jr here too...
The guys over at duckchat.com have a good deal of 10 gauge reload data / information.
I picked up a 10 gauge Browning gold light last year - I’ve never seen a round that can flat out stop a big mallard in mid air, but I have now.
Steel shot wise look for Remington nitro steel, remy has the best hulls...
Swap out what steel shot / lead shot you need or want just match the weight of the load.
you will likely need some felt discs to fill empty space.
Frankly I bought a flat of remy, and a flat of federal perimium steel ...
Also check out a terror tube (choke) all good.
Spot
Last edited by Spotshooter; 08/29/19.