I'd say it was probably chambered for the the .32 short, original load had an 80gr. bullet with 9grs. of blackpowder. If it was chambered for the .32 long, it had a 90gr. bullet with 12-13grs. of blackpowder. Don't sound like much, but if the chips were down and that's all I had in my pocket, I'd gladly take it. Guess that .32 short rimfire was a fairly popular round in it's day. Book says it was a pretty good small game round out to about 50yds., well, that would be in the rifles chambered for it.