These are excellent pellets for hunting. They expand when they hit the target. It's like the old saying "Small hole going in, Large hole coming out."
Pellet guns and Pellet rifles.
A pellet can come in various sizes depending on the type of pellet you are looking for. There are wood pellets for stoves, pellets for guns, pellets for grills. Usually pellets are small in size and under an inch wide.
Some BB guns are designed to shoot BB and pellets, but not all BB guns shoot pellets. The ones that shoot both usually can shoot several BB without reloading but only shoot a single pellet at a time and you have to reload each pellet between each shot.
In general, BB guns are smoothbore, and the barrel is larger than the steel BB. Pellets guns are rifled, and fire a lead pellet that is a squeeze fit to the bore. This is MUCH more accurate than a BB. GOOD pellet guns are more accurate than firearms, within their usable range. I have one pellet rifle that will put pellet after pellet into the same hole in the target at 10 meters.
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.
An AIRSOFT Rifle shoots plastic BBs. An Air rifleshoots steel BBs or lead pellets. Airsoft guns and rifles have an Orange or Red tip on the barrel. BB guns and pellet guns / rifles do not have a red or orange tip on the barrel.
While many pellet guns are configured to be able to fire regular BB's, most BB guns cannot fire standard BB caliber pellets. To fire a pellet, the BB gun would have to be a breech loaded or break-barrel loaded design, and the pellets would have to be loaded single-shot.
Not all BB guns are designed to use pellets. They are only designed to use BBs. Some models however are designed to use both BB's and Pellets. Pellets are harder hitting and will do more damage.
A classic BB gun is spring powered. A pellet gun is powered by a CO2 cartridge, and develops much higher velocity. The above answer is partially correct but there are other factors that make pellet guns more powerful. BB guns come in Spring power but they also come in C02 and pump power plants. Pellet guns come in spring, pump, C02 and PCP power plants. "BB only guns" use a smooth bore barrel much like a straw. This type of system allows the BB to tumble as it leaves the barrel. The BB itself is round and it really does not spin as it flies through the air. This make BBs not as accurate as pellets. Pellets have a skirt at the rear of the pellet, this soft skirt catches the air from the firing source it also catches the grooves in the barrel (Rifled barrels.) The grooves in the barrel cause the pellet to spin as it leaves the barrel. This action helps the pellet fly straighter. The air that is caught in the rear of the pellet drives the pallet faster as it leaves the barrel.. Pellet also come in different weights. Heavier pellets fly slower but fly straighter than lighter pellets. Lighter pellets are more effected by crosswind. BBs do not come in different weights or not enough difference to have any effect on the outcome. The ultimate pellet guns are PCP (PreCharged Pneumatic) air guns. These airguns use a special hand pump or Scuba tank to charge them to 3000 PSI and are capable of firing a 50 caliber pellet at 900 Feet per Second
if the ratio of (Cao+Mgo)/(Al2o3+Sio2) >0.3 then the pellet is called as Basic pellet if it is less it is called Acidic pellet
If the Owners instructions say BB's or Pellets can be used it would be OK. But IF the Owners manual says Pellets. Then NEVER use BB's in a pellet gun. Oh they will work. But you will ruin the rifling in the pellet gun or rifle. Here is why. Good pellet guns have rifling in the barrel. (Little groves) that make the pellet spin as it is fired. Pellets have a soft skirt on the end that catches the air and conforms to these groves. This gives the pellet a spinning effect and adds to accuracy of the pellet. BB guns have a smooth bore barrel ( Like a straw) the BB is hard and tumbles down the barrel and is not as accurate as pellets. If a BB is used in the Pellet barrel it slowly destroys the grooves in the rifled barrel. It also leaves residue from the copper in the barrel. I've seen several good air rifles that have been ruined by the owner forcing it to shoot BB. It's a poor idea to do this to a good air gun.
Pellet guns shoot lead pellets. The advantage of a lead pellet is that it is heavy, and can be shaped into an aerodynamic cone shape that cuts through the air. They are also more responsive to the rifling inside the barrel and spin as they fly. Pellet guns are actually quite different (and much more accurate) than bb guns. You can actually kill small animals with a pellet gun so if you are looking for something that's more of a toy you might want to get an airsoft gun. Those shoot plastic bb's and are non-lethal.