Been down that road myself brother, and wish I'd not. My 28" Parker VH on a 1 1/2 frame was like Chuck's - .005 and .040. Had to pay Briley 3 times what the original 'choke work' cost to correct the left barrel POI which was a foot low and left at 16 yards after opening the choke to .020 frown
You've got a perfect big country pheasant gun; leave it be and get yourself a lighter 16 or 20 with Sk1/Sk2 chokes. Your right arm, both legs, and dog, will thank you smile

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