OT: At this moment I'm gazing upon a M12 16ga I bought for Dad in '94 or so...it will blow the bottom out of a bucket @40 (written about it several times): It turned 100 in January and kicks within African parameters.
I had the chamber/ejection port shaved from 9/16 to 3/4, lengthened the forcing cone and had the steel hot blued. The wood was done with TruOil myself and is something to behold.
The 'smith in Ga. probably got sick of my calls/visits and parkerized the mag tube and half the yoke. Every "now and again" a case weakly ejects with cracked brass: Not TOO concerned as I'm familiar with the old proof standards of Winchester Nickel Steel. It needs to go back to an un-aggravated gunsmith.
That is all.