My reloading bench has a lip all around it, so any shot that spills stays on the table, kind of like, what happens here in Las Vegas stays in Las Vegas.
Incidentally I've got a model 12 in 12ga. that was produced in 1931, it sure is a sweet gun, mine is in modified choke. I noted the stock on yours is fairly dark, could be just the way the light hit yours in pictures.
The bluing on mine is all intact however near the receiver it has turned a dark purplish color, kind of strange, but a fine functioning firearm if I do say so myself.
As far as reloading goes I reload for 12, 20, and 410 all on Mecs, the cheapest I've reloaded is due to my affiliation with a trap and skeet range, as we buy in large quantities, lead, primers, and wads, from the same place as we get our targets from, along with what oneounce stated.