yes. It is possible but I suggest you use hunting pellets (hollow point)
With the right pellet you you can, But it should be a hunting Pellet (Hollow-point) and it should be a heavy pellet not a light weight pellet with at least 900 to1000 FPS.
Can't be answered withou knowing the mass of the pellet.
Yes it is passable, so don't ever aim a BB gun at a person. Buy the way, BB guns usually don't travel at 1200 FPS Pellet guns do.
Canada has strict laws on the power that air rifle springs can produce. So changing the spring would be against the law.
No, a pellet gun can't kill a bear it will only make it angry. There for it will eaither attack you or just ignore it.
350FPS would be sufficient
It's not the fps that kills, but the shape of the pellet that will do the job. All the pellet shapes will kill the rabbit, but hollow point pellets will mushroom on impact and make a clean kill. other pellets might travel right through the rabbit and it will hop off and die later
600 FPS - Pellet 625 FPS - BB
A head shot with hollow point pellets would be best.
FPS stands for Feet Per Second. This is how fast the manufacture rates to BB or pellet as it comes out of the barrel. A slow FPS is around 250 FPS a very fast FPS is around 1200 FPS a few rifles can attain over 1500 FPS. Airsoft guns rarely get above 500 FPS because the projectile is so large.
You are talking about a .22 Cal pellet. anything above 300 FPS (Feet per second ) is sufficient.
In most cases it will be a BB gun. But Pellet guns exceed both the BB and the airsoft guns. Pellet guns can attain speeds over 1200 FPS.