Sheridan Blue Streak 20 cal. eight pumps, about seven hundred fps and a solid lead pellet.
Tried out several a few years ago, using modeling clay as a penetration medium.
Most 177s would go through one and half way through the second stick (one inch square lengths of clay). My old Benjamin 22, had since the sixties and rebuilt a few years back, would go through two, blowing the first one in half.
Sheridan 20 would bury itself in the third, first blown in half, second cratered badly.
I did find some pellets last summer in 177, look like the standard diabolo hollow points but with a brass or copper bead in the nose, that just about took a rabbit's head off at the neck. Shot two out of the garden and I was totally amazed at the destruction. These chrono out at about 950 fps out of my break barrel springer.
Now, the springer and the Sheridan sit beside the sliding door for garden pest duty.
One suggestion that works for me.....on pneumatics, leave one pump in after you're done. Keeps the seal intact. Don't leave your springers cocked.
Same thing "CalvinMD" said but use the CCI CB Longs. They are half the noise of the ones he suggested. No joke. Haven't found a backyard critter they wouldn't dispose of yet. They do not over penetrate either. Note: They are the LONGS not the Long Rifle. Big difference.---Matt
I have about 850 clams invested in my air rifle set up..lol.. its one you fill with a scuba tank.. its like a trap gun when you go buy one the sky is the limit.. I would suggest a break action where you cock the gun with the barrel, a springer type..
wlc--AHHH sounds like you have the same issue as me. I have a wood sided house. Those stink'n woodpeckers drive me nuts. I've dispatched of too many to count. Its the only critters my neighbors agree with me on. Their house is wood too.
I have an old Benjamin Sheridan .20cal and it's been the best, most accurate air rifle I've ever owned. Kilt 42 Chipmunks last summer, most shots between 15 and 30 yards with factory iron sights....rarely miss.