Just my opinion but 220 grain bullets are a poor choice for medium sized game especially at the limited velocities that the Krag is capable of. Load some for nostalgic look and shoot them at targets but use 150 pointy bullets for deer.
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Duly noted, BUT, that was before those 220 grain bullets were "toughened up" in the face of numerous 300 magnums.
The Hornady 220 gr RN is perfectly suited to .30-40 Krag velocities. It is not a "magnum" bullet. Hornady rates the bullet for 1,600 to 3,100 fps, and actually recommends
reduced loads in 'magnum' type cartridges, to hold velocity under 2,800 fps for the 220 RN.
In addition... Round Nose bullets, all else being equal, expand more reliably than other soft point designs.
An idiot hunter that happens to make poor shots with 220 RNs does not mean that the bullet is a poor choice. I could say exactly the same thing about the idiots that got .50 BMG "banned" in Idaho. They were using a great bullet. ...But it was the poorly-placed, 1,000+ yard shots on an entire herd of elk that got the political ball rolling.
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I don't think I ever tried the Sierra 220 RNs.
I did run about 300 of the Hornady 220s through my Krag, though. Good bullet. ...And, contrary to some opinions, it was even
designed with the .30-40 Krag in mind.
If you have difficulty tracking down any of the Hornady 220 RNs, I still have 200-300 on hand, and I don't use them in anything any more. I'd make you a good deal on them (all, or some). ...Just send me a PM.