The .32-20 can be a difficult one to reload. I'd advise you to check all the cases for the same length before you start. The cases are long and thin and tend to crumple pretty easy if you get a long one. They're hard enough to get that there's no reason to waste them. If you trim them to length you should be OK. If all the empties are from the same lot of new ammo, you also should be ok for a few reloading cycles.

Use small pistol primers. You're firing them in a handgun, and you don't have the hammer fall to crush the harder rifle primer. With the low pressures you'll be running it won't be a problem.

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Dick Burg