Hello Mark, I shoot spreaders for in your face birds while at registered tournaments, all my clay target guns are choked tightly. I've used both Kent and Fiocchi Power spreaders and they both use the exact SAME Gualandi wad. It has a cruciform (+ shaped) piece molded in the center shot cavity. Only difference is the Kent spreader uses their Diamond shot, coated with a silver graphite compound as I understand it. Fiocchi uses regular gray lead shot. Patterning is equivalent. Either will open a 70% pattern to 50% and shoot to ~same POI as regular shells. I've done much testing.
I've always shot the 1-1/8 ounce, 1250 fps load because none of my regular vendors stock the Fiocchi 1 ounce offering. If you go through the physics calculations you'll find the 1 ounce load at 1300 will have slightly less recoil, probably not enough to matter a whole lot. As an aside, I only use these spreaders in modern o/u target guns and in a Model 21. Recoil with the 1250 fps load is pretty stout and you definitely know when you have one in the chamber. I don't use factory spreaders in my vintage Foxes, LCS or Parkers.
The factory spreaders definitely have their place if you are a competitive shooter. Most classes are won or lost by 1 or 2 birds and the spreaders can make that difference. I don't use any spreaders for casual shooting - forces you to see the right lead, or miss. You might try Precison Reloading to see if they have the Gualandi wad. I hope this helps. Silvers
PS, I an SILVERS not SLIVER
