Just wanted to update, Switched to the heavy buffer from Nokick.com and no more cycling issues. (so far) I got out the chrono and checked some ammo loads.
My current load of 4.3gr of WSF and a 147g FMJ over a 10 shot string averaged 950fps so subsonic but still had a sharper crack.
I tried 3.5 grains of titegroup and got 975 FPS so a faster powder and had much less of a crack. The WSF must have still been burning as it exited the barrel.