What gage c02 cartridge for Benjamin Franklin model 250 pistol?

Answer 1

This model took an 8 gram CO2 cartridge. It's hard to locate them now, BUT a good substitute is an 8 gram Nitrogen (N2O) that you can find at any large Liquor store. They will work in place of a CO2 cartridge and they are not expensive. N2O is used to whip cream.

Answer 2

They use a little bit smaller cartridge than most. The most common is ( 12 gram). The Ben franklin 250 uses a ( 8 gram ) sold at Wal-Mart.