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Ok, checked the Ram-Shot tool cartridges (paper cup with roll crimp) and they will fit a 22 LR chamber just like a 22 cartridge. The box has a caution stating that :"These cartridges must not be used in a firearm." That is probably where the statements I read about, being afraid to shoot them in a gun came from. Of course, no projectile, no pressure, as these things are powder driven not nitro detonation. Plus the little chamber insert for the gun itself is about 1/8 inch thick steel inserted in a smooth bore barrel about 1/8 thick. Now the bore is about 38 cal to accommodate the front plastic fins and the rear round head of the nail or pin as it is properly called.
The price marked on the box, from my store was $10.50 per 100 and is a Green load which is a #3 of #1-6 for brass, with nickel going on up from a #7 to a #12 , #12 is the highest pressure 22 LR load for a high velocity gun. The #3 is a light load and is what I suggested you look for.
It is stated by some in that thread I mentioned that the powder is corrosive, however there is not one bit of evidence of this on the 70s vintage cartridges in this box I examined.
Ed
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