Wildcat shooting 33.9g at 880 fps power mods. shot count/string

LongbrownboxI don't know how to make new parts for my .25 cal Wildcat but fortunately I don't need to. Shot 3 mags (24) through the chrony & here's what I got. 
High 893
Low 885
Avg 888
ES 8
SD 1
When I'm shooting I don't take out the mag, I just continue to add a pellet. Loving it!


Is that with 33.9 grn pellets or 25.4 grn jsb kings pellets?