Dean,
First you are so right about the great time shooting at Scarborough. I thoroughly enjoyed your and the other fellows company.
You are correct the V Grade refers to the grade of the gun or at least to the barrel grade and not the steel itself. My statement was incorrect. However, I don't subscribe to the notion that PB used a unique vulcan grade of steel throughout its production era. Vulcan Steel on the top rib was a marketing identifier just as V grade was on the side of the lug of late Remington guns. It was a different approach but served the same purpose.
I agree with you Bill that the barrel grade won't necessarily match the G grade frame. The first time I saw a Remington rebarrel it was marked V GRADE and skeet in skeet out on a 1892 DH. The barrels were serial numbered to the gun.
This gun is listed as having zero options but the rebarrel has ejectors. You can't tell if the frame was converted to ejectors or not from the photo. Deliberately I suspect.
Bill how to you know the barrels have a vent rib? What did I miss.
Erick