I've owned cast Ballard rifles chambered in calibers I wouldn't consider making up myself. But I never felt concerned about shooting them, and did shoot them a lot. Not just factory calibers, but also larger rifle calibers too!
I've owned a deluxe #2 Ballard done similar to a high grade Union Hill for some years, and chambered in .32-40 Ballard. It was not a recent rework, and the barrel is original to the gun. But someone opened up the bored and re-rifled it, then chambered it to .32-40. I shoot it as a breech seater, with smokeless powder, and loads in the BP range.
I'm only guessing it was rebored based on it being marked as a "32 Long" on the barrel, but having a larger .317" bore. I they could have followed the existing rifling, but don't think so since the twist rate is faster than what Marlin used for their .32 Long. Marlin used a 1:22" twist for .32 Long, and this is a 1:15" twist. And of course the dimensions are larger than the original .32 Long also.
At first glance you'd assume it was a nickeled frame Union Hill, but the 3 line address, caliber stamp, and cast frame tell the truth of what it is.
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