Which ones are you considering? What do you already have?When I had M&P compact 22 for years I shot only CCI standard velocity and mini mag round nose. I agree with JVK45 that the Standard Velocity was clean and consistent. I use it for target shooting. I used the Mini Mag when plinking outdoors or chasing varmints. It is dirtier than the SV. CCI is well known for quality 22 ammo. I tried the Velocitor and Stinger loads. Both are good if you hunt. I do not think you cn wrong with CCI ammo. I am looking for a 22 pistol at this time. When I find it I will feed it CCI ammo.