Determing what caliber in a pcp

I’m assuming you ment Caliber I find that 25 is more stable at longer distances. You prey though can be taken out with any caliber.

Do some Youtube viewing, start with Ted's Holdover, Air Arms Hunting S A, SniperQty, Hunter One. A new comer on this forum Bob O deserves a look. Hajimoto does a fine job with a Marauder .22 Sorry for others that I have enjoyed viewing but did not mention. Do a little homework as to your over all weight, how your airing up, shooting off hand/supported? carrying in field, sitting in blind, house, truck? Windy conditions? or calm. Once your on the page a large number of other vids will show. If possible buy quality, as many here will post it's cheaper in the long run.

Local availability of pellets vs. mail order.

Generally speaking, if you don't have to worry about over penetration or limiting range I say bigger is better. For birds out to reasonable ranges a .22 will work well. With a full power PCP you should be able to match a .177 trajectory with a .22.

YOU ALSO COULD GET A RIFLE LIKE THE BROCOCK SNIPER OR STREAMLINE THAT U CAN GET IN 3 CAL 177 22 25. THAT HAS A POWER WHEEL LO MED HI I LIKE THE BIGGER CALS W POWER WHEELGIVES U EVERY ANSWER. TO SCENARIO INCLUDING MLARGER GAME WHEN NEEDED. PAT