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I use the same load as Al and it works well for me.
But with relatively lighter loads (a little slower and less lead) you do have to make sure to hit some knockdowns a little more solidly. But almost never have to amke up a shotgun.
If you load with a MEC a 27 powder bushing with Clays and 1oz. 7.5 shot works well
shotshell loads. My personal favorite is: 12 ga AA Hull, 13 gr Red Dot or Clays, Gray wad and 7/8oz shot. Works like a dream. (Red Dot and Clays have similar pressures)