Anyone using Hobbies in .22 past 15 yards or so?

I’ve used these in the past on squirrels at 17 yards if I remember correctly and they were absolutely devastating, I’ve noticed that they’re only £14ish a tin and if I could stretch them to 20yards in the garden they would make excellent rat medicine.

I’d be using a PCP so I’m guessing lower would be down a touch but I’m interested to know what velocity they’d produce in a PCP