the last 2 new that i saw didn't work out from the box. we use only 9mm 115 and 124gr. factory ammo pf 135-142. fiochi ,magtech, s&b. R.S 8 -9lb
after tuning both of them run 100%. first shot over 20k and second ~5k .
the only thing that was broken it's the cocking handle after 1k. that hit hard shooter's face.