Benjamin Sheridan makes both .22 and .25 caliber pellet guns. ----------------------Corrected answer---------------------------------- Crosman air gun company owns both the Benjamin and Sheridan line of air guns and rifles. The Benjamin rifles models are made in .177, .22 and .25 caliber. The Sheridan line is only made in .20 caliber. The name "Benjamin Sheridan" is no longer placed on any one model. In the past Benjamin did make a 20 .cal pellet gun Benjamin also makes a .357 caliber model named the Rogue.
You need to consult your owner's manual. Some BB guns can shoot pellets, but some cannot.
The Benjamin 250 is one of three pistols that make up the 250 line of air guns. Here is how they break down: 250 is a .175 BB pistol 252 is a .22 caliber pellet pistol 257 is a .177 caliber pistol. The problem is finding .175 BB's today most all BB are .177 caliber. I've heard that BB are still .175 only the caliber of the barrel has moved up to .177 to accommodate pellets. I suggest you just try one.
Pellet guns tend to come in two standard caliber sizes. The first smaller caliber is the most common for pellets guns and is .177 caliber. The second is .22 caliber that can be found on some higher powered pellet gun models.
Air guns and air rifles come in many sizes. BB guns are .177. Pellet guns & rifles are made in .177, .20, .22, .25, 9MM, 357 Cal, 45 Cal and 50 Caliber. The last four sizes are usually restricted to the PCP (PreCharged Pneumatic) class of air guns. (Big Boar)
This is just an opinion of the airguns that I have owned. I can only assume you mean both guns and rifles, not just guns (Like you said in the question). Most collectors and longtime users consider the Sheridan "C" Series air rifles and the Benjamin 392 or 397 the standard that all pump air guns are measured by. They are so well made that they last generations and have a considerable amount of power. The Sheridan C9 is a .20 caliber The Benjamin 397 is a .177 caliber The Benjamin 392 is a .22 caliber. You can not go wrong with any of these models.
There are over 100 different model .177 BB guns. It would help if you stated the model you are asking about.
Any air gun or rifle that uses a .177 Caliber pellet can use the Gamo .177 Red Fire Pellet. No matter who makes the air gun. The Caliber .177 is universal to all .177 caliber pellet guns or rifles.
With VERY FEW exceptions all BB guns use the same size BB .177 Caliber.
This is a .22 caliber air pistol not a .177 caliber pistol. See the link below for the owners manual.
Lets get something straight. There are BB guns / Rifles and there are Pellet guns / Rifles and there are a few BB & pellet rifle combinations. Most BB guns are .177 Caliber, there are a very few that are .22 caliber. Pellet gun & Rifles come in .177, .20, .22, .25, 9 mm, 40 Caliber, and 50 Caliber. The last 3 calibers are usually high powered air rifles in the PCP class of rifles (PreCharged Pneumatic) they require a special pump or SCUBA tank to charge them. So Yes there are calibers much larger than .177
They are both the same size. .177