DS - I recall it as being 0.035", will confirm tonight. The gun is a trap setup except for a lower than usual stock and was shot at trap professionally for many years before I got it. I'd strongly suggest you at least try using spreaders before cutting the chokes. I have shot trap (non-spreader wads), skeet (all spreader wads), and SC & 5-stand (mix of regular wads and spreader wads to effect choke changes). Load up a supply of 7/8 oz #9 spreaders, 1 oz #8 or #8 1/2 in regular wads, and 1 1/8 oz #7 1/2 regular wads. Select shells for range and choke needed.
Just for the record, the 'ole hiefer has 32" bbls, 14 1/4" LOP (SS trigger, so effective LOP of 14 3/4"-15"), weighs 8# 11 oz (very heavy), balances 6 1/2" to trigger (effective 5 3/4"-6" CG = forward balance), swings 2.48 unmounted (very slow), swings 10.55 mounted (very slow), and has a half weight radius of 11.5" (very dispersed weight); average game gun is 6 1/2#, 4 1/2", 1.45, 6.4, & 10.4. All that translates into a very stable swing that demands a lot of muscle when the birds are changing angle fast.
