Sec. 10. Be it further enacted, That the mayor and councilmen of said town shall have full power to levy and collect a license tax upon any business, trade or profession carried on in said town: Provided, That the maximum amount of each license or tax shall not exceed the following; and provided further, that when, in the judgment of the mayor and councilmen, a less amount than the maximum will be necessary to carry on the government of the town, that the same proportion of all taxes enumerated in this act shall be levied and collected, as follows:

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[P]istols or pistol cartridges, whether the participation in any exercise or entertainment, not for charitable, religious or school purposes, each, three dollars[.]