early Model 1912 in 20 gauge- Just picked up another M1912- sn is 32074== 25" plain barrel full choke nickel steel field gun in about85% OAL condition- no chamber length marked, as on my other 20 ga. M12- 1931 field gun 28" Mod. choke solid rib barrel and stamped 2&3/4" chamber. I haven't shot it yet, but am guessing it has the 2&1/2" chambering. Would I be safe in shooting a 7/8 ounce skeet load in it- is it true that the main operation to "convert" a 2&1/2" to a 2&3/4" 20 bore pumpgun is the differing radius on the front facing radius of the ejection port, as machined into the steel of the receiver port?? I'd like to shoot it this coming Fall on grouse- carries nicely in hand, and I like the first style "perch bellied" buttstock- 7/8 ounce of No. 8 chilled shot in that Full choke ought to "defeather" a Sir Ruff like downtown--RWTF
