The smokeless load for the 25 Stevens RF is listed as giving a velocity of 1180 fps with a 65 grain lead bullet.
Both BP and Dellet, who post on these forums, reported firing two black powder 25 RF rounds and observed a velocity of 1112 fps. Dellet also reported that Canuck 25 RF cartridges, gave a velocity of 1124 fps, when fired from a 22" barreled Favorite.
I thought that, if a nail gun cartridge and 50 grain bullet, gave a velocity at or below 1100 fps, that it would be safe to fire in the Favorite, until a friend mentioned that the nail gun cartridges might have a different pressure curve, from black powder or the smokeless powder used in the Canuck cartridges, that could still damage the Favorite, even though it produced the same muzzle velocity.
Different powders do burn differently and can create significantly different pressures, while producing the same velocity, so it seems as if the preceding caution might have merit.
Does anyone know of any reports of high pressure signs, when using the green or brown nail gun cartridges, in firearms? 
Otto 

Hey Guys & Gals

New to the Forum , tho not new to Stevens .

The Favorites in .25 Stevens & .32 rf have 24 '' barrels
the Favs. in .22lr have 22 '' barrels .

I've not seen any Favorites with barrel numbers
matching the receiver numbers only the Model 44 & 44 1/2 .

Also the 1894 Models that I have only have Favorite
on the top of the receiver and some don't .

I do appreciate exchanging info. with you Stevens Guru's
as the more I learn the more that I know that I don't know.

prost , skoal & cheers .. skwerl