You should be fine with the cartridges you load. I've used 7/8 oz 1100 fps loads for sporting clays for more than a decade. They work fine in 2 3/4 inch AA cases. Long ago Sherman Bell did pressure testing on short chambered guns with 2 3/4 inch shells and the pressure increase was negligible. And that has been my experience as well.
As for recoil, that's more a factor of gun weight and payload than anything else. I've never been cognizant of any added recoil with 2 3/4 inch cases.
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