I have a small challange. A martini cadet with a matchgrade barrel in 222R, A can of Benjamin 22cal. pellets. And a backyard full of tree rats.
I remember somewhere you could drive a pellet with a primer to respectable velocity. I think a pop bottle could contain the noise so the neighbor dosn't get to excited. Think I can breech seat the pellet lubed with Alox and drive it with a case converted to lg.rifle mag primer. Any ideas or suggestions.
Tom

17 Hornady Mach 2 fired from in the room out the open sliding glass door...the neighbor never looked  up and the wife down stairs never said anything...Goes with out say watch your back stop...this case a stack of oak firewood was plenty.

Two additional comments...
1) I believe Charlie Dell used a pellet setup to measure power of his rifle primers when he did that series of tests 5-6 years ago.  The barrel was only a few inches in length and the pellet still didn't achieve very much velocity.  I don't think you could get it to overcome the friction of traveling down a rifle barrel.  Maybe some of Charlie's regular visitors like leadball, singleshot or Dale53 remembers more about the setup???
2) I used a 3rd model Winder Musket (Winchester Low-wall) in .22 short a few years back and thought I was getting misfires until it dawned on me that I WAS hearing the ring of the bullet on the backstop.  That and the fall of the hammer were all I could hear indoors with muffs on...outside it was not significantly noticeable even without the muffs.  Are you SURE you want to do this with pellets??

JMHO, YMMV!
Froggie

I've used a .223 Rem case drilled out for a 209 shotgun primer with a pellet and it worked out to 20yds. I could hit a pop can pretty regularly but much smaller and it was 50/50. I used it in a TCR 83.

I use CB Longs in my LR chambers with pretty good results on the target and no chance of damaging anything. The sound of the bullet hitting the steel Outer's bullet trap is the loudest noise I hear, although the report itself is noticable.
Good luck, Joe

     If you are going to use cb longs it is best to file the nose flat.  It gives much better preformance than the factory round nose.   
     I have observed others use pointed pellets to shot Starlings. When hit they squawk and flop aroung and make all sorts of fuss before expiring.  You hit them with a match flat nose and they just drop.

Regarding Charlie Dell's experiments with primers and pellets. His objective was to see if by varying the stiker impact, if that made a difference in ignition. He visualized chronographing the pellet - varying speeds would signify varying ignition. Well, the first thing that happened was the front end of the pellets blew out. Charlie was not easily dissuaded. He then made a mould and cast some solid pellets. This solved that problem but he learned that varying the striker hit did NOT vary the velocity of the pellet (totally contrary to expectations).

Short story - do NOT try to propel air rifle pellets by primers. Use an air rifle. It is better in every way (and it works!).

Dale53

For years I have controlled vermin in the back yard using a .22 revolver loaded with Crossman .22 pellets and primed .22 cases. The only noise is the hammer hitting the frame. I mostly kill racoons with this and it's quite effective. I have used the super colibri's but the heavier projectiles cut the velocity too much to work very well on the critters. The buddy who showed me this trick had been doing it for quite a while with a zimmer stuetzen that was a whole lot prettier than my revolver.