Won’t comment on could you shoot 1 1/8 oz but will say lot of Parker members use 7/8 oz loads for targets. If chokes are original odds are they are very tight & light shot loads give more than adequate shot density. Advantage is light recoil, significant advantage 100 plus shot round of sporting clays. I do load some 1 oz for birds when few shells will be fired.
Very nice gun
William
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