Bibbyman, those are some great rifles you have there!! I would love to see your 577-450 if you have a picture of it. 
   Living 8 miles up county mud roads in Montana, I have had the same "problem" with our venison friends. I ran pack strings out of the wilderness for years for a living. When I got married and the kids started multiplying, I was forced to become like a "market hunter" to keep enough meat on the table. I could count on 8 deer tags per year. In 10 years time, I had killed my quota ever year (more with special "depredation hunt" tags). The only way I could stand it was to use my single shot rifles. It wasn't hunting, it was harvesting and butchering. My kids could break down a deer from skinning to freezer in about 20 minutes. Now that the kids are grown and gone, I hunt squirrels and rabbits. Killinging deer in those numbers took the joy of hunting out of the picture...
Hope you and the missus are enjoying the delicious fruit of your labors 
Tom W.

Bibbyman, 
   Yeah, I debated on posting that for a while. A whole lot of good folks don't live as close to the bone as some of us who are in the remote areas. We ate everything we could salvage (as I'm sure you and the missus do), neck meat (you should try my wife's venison mince meat pie !!), flank, ribs, lower forlegs, heart ( the kids called it Swiss steak because of the holes), liver, tongue. I'm a stickler about hair and fat, so the kids did a great job about it. I didn't mean to divert your post. You sound like a guy who earns his way, and you have my deepest respect for that.
        Sometimes, folks who trade comfort and the opportunity to earn great money, end up with something just as good, simple living and the satisfaction that comes from providing for your loved ones in a more physical means. I currently live in "town" (pop. 1600), but just black bear at my old place. The grizzly's have moved closer to town tho. Used to never see one closer than 30 miles out. Now it's more like 10.
   Still like to see your Martini! Here is my Swinburn sporting rifle, circa late 1870's or early 80's

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Caliber, Westley Richards # 2 Musket 
She is a beast to shoot, but sure drops a deer or elk!
   
My best to you and the Mrs.
Tom W.

Bibbyman, Have you tried VTI gun parts? The handle most parts for Uberti, ASM, Pedersoli, and others. They are a great resource for Italian rifle and pistol parts

Tom W.

Bibbyman,
   Yeah, all the Italian stuff took a pretty big jump when the Cowboy Action Shooting hobby took off.  It would be worth a call to VTI. I have found them to be really helpful and they will usually work with you, depending on what they have in stock. That Pedersoli would be worth putting a new sight on if it came to that!
   The estate auctions here don't normally turn up anything but busted farm equipment and old pots and pans. I've gotten a few gems over the years, but anything like rifles are usually sold at "blue sky" prices.

   Nice rifles, by the way !! 

Tom W.

Here are a couple of old timers that there is little to tell. The Martini Hinery 577/450 has only "FIELD RIFLE Co" on one line and "Birmingham" on another on the barrel flat just ahead of the action.  It has a small line of marks on the left side. I don't find the British arrow or any marks on the stock.  There is a string of 6 small numbers on the right side just behind and above the cock indicator.  They can be read from the top side and are obviously hand stamped.   Ahead of the first band is a rawhide repair where the stock looks cracked if not broken. 

The rolling block has no marking visible on the outside except for a P in front of the trigger guard. It's all complete and works.   Matching,  I don't know.  Looks to be 43 caliber.  Spanish,  Egyptian or ?? I don't know as there is no markings to say.

You guys have any info on these old dowgs?