Product Code 23921 is a box of 20 and Product Code 53921 is a box of 50. Other than the number of rounds per box are there any other differences? The price difference between the box of 20 and the box of 50 is not much.
Thanks

I asked Speer this a few years ago. Other than the 20 round box starting with a '2' and the 50 round box starting with a '5', the remaining numbers are identical, so they are the same round. The 50 round boxes usually sport the 'LE' designator.

That ammo is tough to beat for personal defense in snub nose revolvers.