Someone Ackleyerized it, so it's somewhere between a 250 Savage and 257 Roberts. It's a 15% capacity increase, which should amount to something close to a 4% velocity increase (ie: 2600 fps with a 115 grain should now go 2700 fps, which is about like a 257 Roberts).
Looks like better than standard wood, plus an ebony tip, which I don't remember seeing on Ruger 77s in the past. Got a good enough deal that it really doesn't matter at this point because it should just be a fun little gun.
Ackley's favorite imp cartridge was the 250 Savage. He said it gained more than any other cartridge by improving it. I used to struggle with improved cartridge's quite a bit. kept thinking what I needed to do was have my 243 improved. never did it and doubt I ever will. I think at this point I only wanted to do it to have something different. A friend has one on a Marlin bolt rifle, 250 Ack, don't remember the model, a newer one. I've shot it once and it it shot very well. It did seem to me that the cartridge didn't chamber as well as it should have. Maybe a problem by the guy that did the rifle.
Looks good, i have always liked ruger rifles. You are lucky to be able to use Gunbrokers: Many times i see something i like and would buy but lots of sellers in there will not ship internationally, eventhough i have a place that has a valid FFL to have it shipped to. I guess on the bright side i save money.
The record books, that are put out by Boone & Crocket and Pope & Young and where I live is Henry Kelsey they are a great way to research a state or a province for big game. This does take some time but the knowledge it gives you, can be very valuable. Not all hunters have their trophies recorded, as where I live after the Hanson Buck became the new world record typical Whitetail, we saw a flood of hunters and now that has happened, some hunters are shying away from the record books but...