Owned one for around 10 years or so before it was stolen and never recovered. Savage 99-G .250 Savage, probably early 1950's production, with Lyman receiver sight.
Savage marked most of these rifles ".250 Savage", although some will have the ".250-3000" caliber marking. This was a marketing device for a factory rifle and cartridge achieving 3000 FPS, which Savage accomplished by using 87-grain bullets. Those lighter bullets were not highly regarded by many hunters due to a reputation for fragmentation and failure to fully penetrate on game animals, and many articles written throughout the 1950's to 1970's recommended the 100-grain bullets for use on game, with the lighter bullets primarily for varmint use. Heavier bullets, like the 120-grain, are not fully stabilized in the Savage barrels due to slower rifling twist, and velocities are necessarily reduced due to limited powder capacity of the .250 case.
Very nicely balanced rifle, lightweight enough for all day in the Colorado Rockies. Good large trigger guard allowed use with gloves in winter. I installed a QD sling swivel base on the toe of the buttstock and barrel-band base forward of the slender fore-end (must have a sling on a hunting rifle, in my opinion).
Plenty accurate enough for deer out to 200 yards or so, although not nearly as accurate as a good bolt-action rifle with scope.
Powerwise, more than adequate for mule deer, but I would not have taken it after elk or other large game.
Played with several loads including 75-grain HP, 87-grain spitzer, and 100-grain spitzer. Settled on the Speer 100-grain Hot-Cor spitzer at about 2700-2800 FPS, as I recall, which performed very well on deer.
The standard buttstock on the 99's is slim and low. Very nice for carrying, and perfectly suitable for open sights, but not very good for using a scope. May require one of the old lace-on cheekpads to work readily with a scope.
I have also used .25-06 and .257 Roberts in other rifles. In my opinion, the .250 Savage will do about anything these larger, harder kicking, calibers will do out to 200 yards or so with the only exception being the ability to handle heavier bullets like the 120-grains that I prefer in those other calibers (and barrels that will stabilize them).