TX200 MKlll .22 Chrono

[mrjohns]

This is the first chance iv'e had to chronograph my TX200 .22. 10 shots averaged 637fps, shooting JSB Exact 15.89. I have a Vortek PG2 Sho tune kit in it. Is this the norm for pellet speed in the TX? I really expected to shoot in the 680-690 fps.

[grumpy]

Howdy, not real familar with the numbers of a TX but sounds a bit low to me. Will ask some friends who have them what they get