Not usually. There are several factors involved besides the spring, but the .22 will usually use a stronger spring to propel the heavier pellet.
No
A .177 caliber air rifle has very little recoil.
.177 airguns in india
The model 100 is a .177 caliber air rifle. The model 101 is a .22 Caliber rifle. Basically the same air rifle just different calibers.
It isn't dangerous. It could possibly exceed a 12 ft./lb. legal limit when it's close to that in .177.
No they won't fit. If you force it, it will ruin the rifle.
If you are serious about air rifle .177 competition then there are several to choose from (See the link below) But I would select one of the Feinwerkbau P700 models.
It all depends on the rifle, pellet and power source.
This is a .177 pellet rifle.
no
spring drives a piston that pushes air
Currently it is selling for $69.99. I suggest that you also look at the Crosman 2104x, it's the same rifle, I would suggest that you look at the "pyramydair" home page to see both of these rifles.