about 2300 FPS for the HMR2
1600 for the stinger. It is the parent case of the HMR2. it is slightly longer than the standard 22LR case
2200 for a 22 mag.
I have a 22LR, 22Mag, and a 17HMR.
All three have their place.
I like the 22 long rifle for small game hunting, and then I like to use the big slow 40 grain round nose target ammo. The hyper stuff really tears up rabbits and bushy tails.
the 22 mag is great under 150 yards and with all the new ammo choices it will do everything that the others will do.
The 17 HMR is best for varmint hunting in rocky areas where I do not have to worry about over penitration or a richochette.
The little 17grain bullet comes apart if it hits anything hard.