Predator gto 22 and 25 cal.

Folks. I am stuck using non lead ammo. Has anyone used gto predators out of an Fx in eithe 22 or 25 caliber. What kind of accuracy are you getting and at what speed. I am hoping to shoot out of a Dreamline. I am thinking if I turn down the power I will be able to get a lot of shots. In addition how. Do you think noise will be affected
Been a while. What did you find out after you experimented? Curious how fast have you shot the GTOs and still seen excellent accuracy? Thanks for any insight.