I just bought a CZ 455 Trainer. My suppressor guy said to shoot sub sonic ammo, suppressed of course, and out to 300 it is proving two things: one, it WILL group under an MOA and two, it needs at least a 20 - 25 MOA rail with a scope with a lot of come ups! But it is crazy fun! I agree that long shots on PDs with a 22 ain't very humane, but golf balls and clay targets are supin else!
Hey Cat--I remember reading once about the 290 yard pigeons. Tell us some more about your setup--what sort of hundred yd. groups are you getting out of those 45g CCI's?I have a Remington 40X in 22RF. It has a 14" twist (faster than usual).
I put a Leupold 6.5-20x40 VX-III EFR, and mounted the scope in Burris Signature ZEE rings. It is set up, so the elevation turret is at the bottom of it's travel, when the rifle is "0"ed at 100 yds. It has an "Anti-cant" bubble on it.
This gives me 40 minutes of up.
It has a suppressor fitted, and I shoot CCI 45gr HP "Suppressor" ammo out of it..
I have killed feral barn pigeons as far as 290 yds with it on very calm days.