FPS on a barrel swap??

I have been shooting a CO2 Talon SS in 22 cal with a 12 inch barrel, and saw a 24 inch 117 cal barrel on the yellow and picked it up. After installing it yesterday I ran it thru the crony and it is shooting JSB 7.3s at an astounding 925 FPS. Is that a record on CO2? I’m sure it is reading correctly as I reshot a couple other break barrel guns and got the normal readings with them? I’m pleased but why is it shooting so hard? Thanks for your indulgence. Brian Smith