I've had two Springfields Armory Krags for three decades now: a '98 Carbine and a 1900 Infantry rifle. Both guns are in excellent overall condition, really collector items, both wood and metal. The stocks are a beautiful boned reddish color that's the hallmark of those between wars guns. I picked them up back in '88 when not many guys were interested, long before Gunbroker and the internet inflated demand...they were less than $500 each from a dealer at the big Louisville gun show.
Both have good/excellent bores but over sized at 0.310". However, with jacketed bullets they'll do about 2 MOA at 100 from a sling prone position with the rifle and about the same with the carbine off a sandbagged rest. With correctly sized heavy cast gas checked bullets, they'd easily keep 'em all in < than 3" at 100.
The beauty of the Springfield Krag is the smoothness of its bolt in operation. Like butter compared to even a Nat'l Match '03. Loading them from the swing out gate demands some attention...and round nose bullets are preferred as that's what the feed ramp(s) were designed for. They'll feed spitzers but I've had better accuracy with round nose and with no hang-ups from those pointy bullets in rapid fire.
The rifle with the '96 model sight on it did very well for me at Camp Perry in the vintage match where I got a silver with it back in '06. But reloading with loose rounds in the rapid fire phase was a real goat rope. I dropped one round and still scored an 87 for it at 200. I was shooting my own loads with Remington 170 gr .30-30 Core-Locts, at the time.
While the infantry rifle is a joy to shoot, oversized bore and all, it's really too big for hunting. I do shoot it some with cast bullets (Lyman's 311291 gc - a .30-30 bullet design) & it really perks with a mild dose of 4227 for about 1500 fps.
The carbine is another fish entirely. At 8 lbs.+, it's easy on the shoulder even with R-P factory 180's, but really shines with Remington's excellent .30 cal. 170 gr Core-Loct bullet. Loaded for deer, I get 2400 fps out of it and believe me brothers, it's a dandy deer combination. The sights, at least for hunting purposes, are miniscule but with a dab of white-out typewriter correction fluid, that front blade really stands out, with absolutely no glare.
If any of you are interested, PM me and I'll send you some info on my loads for the .30-40. Best regards, Rod