First let me say I reload, therefore I am in total control and I like that. I shoot low to moderate pressure loads. If you want to shoot old guns you should really look into reloading if you don't already. It opens up a whole new world.
The amount of recoil and thus stress placed on your stock will be a significant increase over a mild 1 1/4 ounce load pushed at 1220 fps.
The Fiocchi loads you cited will generate almost 24% percent more ft lbs energy in recoil in a 7 3/4 pound gun, 31.66lbs vs 25.65 pounds.
Let those wonderful Parker chokes do the work, you don't need to shoot baby magnums through a Parker.
PS. If you were to put the two loads on the pattern board you may find there is no signifcant difference in the patterns at 40 yards. The lighter load pushed at slower velocity has fewer deformed pellets due to barrel scrub and crushing in the shot column. The advantage to those baby mags is minimal. Especially if you go out and buy the nickle plated shot to reload with vs. magnum or chilled lead.
PPS. BTW I am not a Parker expert but I did stay at a Holiday Inn Express once and put a Parker shotgun under the bed.
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