In many cities or neighborhoods, it's illegal to shoot a firearm. So a 500fps primer-driven bullet may be illegal, where a 1000fps air-driven pellet may not.

Plus, there are plenty of .22LR rounds that are subsonic (< 1100fps). There's no sonic advantage to dropping all the way down to 500fps. A 500fps hit might just annoy a raccoon. They're tough critters.

Can you get a couple of raccoon-proof garbage cans instead?

or a large body of water

But it's only a half acre lot so he has to be very careful if he does.

I think he really just wants an excuse to try out this stuff. I have to admit that I'm intrigued by the idea of primers powerful enough to propel a 20g projectile at 500 fps. Maybe I'll buy a box and he can come out here and shoot at drink cans or gophers.

... One bozo's theory:

Shooting a raccoon is like shooting Al Quaeda's second-in-command.

There are more raccoons in line to raid his garbage cans, just like there's a few in line for that open Al Qaeda slot.

There is no "win".

They're hard enough to take out with regular .22LR.

Why shoot them? There will just be more...he needs to figure out how to drive them away

Until I Googled that fact, I was thinking you had to go into the woods in search of a cooperative coyote......

is so time consuming! Seriously, it's better to run the critters off than to shoot them. If you take a bad shot, then they suffer until they die-- it's just cruel. Just make them feel crappy about coming around IE: is some damned coyote going to have me for dinner? that works better all around-

more than most air rifles....however.com they're still loud out of a pistol.

Of course they won't cycle the action of any semi auto but that's fine and dandy for the most part.

I've never killed anything with the primer only ammo, but I know it will shoot thru a 1" board so they should work for pest control.