2 types of 25 caliber Stevens. 1. In centerfire, you have 25-20 Stevens and I believe 25-50 Stevens of which brass is available from Midway. 2. In rimfire you have the 25. rimfire round which apparently is unavailable as I am currently searching for a source.
A type of ammunition.
Generally the .177 caliber universal pellet or BB is the most common ammunition for an air rifle. However other pellets are available for larger bore air rifles. These include. .20, .22, .25, .30, 9MM, 45 cal, 357 cal and finally .50 caliber.
the ammunition would be the 25-20 Winchester center fire (25-20 WCF). ammunition is still manufactured by Winchester for this rifle.
25-06: The 25 means that it is a 25 caliber. The 06 means that it is a longer bullet than a regular 25 caliber bullet
Browning made the "Baby Browning" in Belgium for several years, on the muzzel of this tiny 6 shot automatic it states .6mm. It does in fact take 25 caliber ammunition.
Model indicates a particular design by a particular maker. In the case of the Marlin/Glenfield Model 25 rifle, it is a bolt action rifle in caliber .22 Long Rifle. It has a 7 shot box type magazine. The Model 25M is in caliber .22 Magnum
Both Shinsung and Sam Yang make a 50 caliber air rifle. The largest caliber Weinrauch makes is a .25 caliber.
20-100
The value of the Stevens .25 caliber lever action rifle varies quite a bit with its condition. This gun sells for about 300 dollars in good to excellent condition.
That is a .22 caliber BLANK PISTOL. Do NOT attempt to fire live ammunition in it. Value is about $25-$45.
It was not designed for 25 cal ammunition.
25-130 USD or so