There are also matches at Pecan Plantation in Granbury, I think every other month. And there are matches held in Oklahoma City and Boerne, down by San Antonio. For the "regular" (not long range or extreme) field target matches , you would need to be under 20 foot pounds. Shoot me a PM if you want to shoot at Arlington (next match is July 24th) and I can hook you up with a loaner gun if needed. I shoot a .22 Avenger at Ron's place, works fine. You would want to use the .177 for the regular matches and the .25 for long range. .25 won't fit in some of the kill zones in the regular matches, .177 will struggle at 100 yards at the long range matches.
One other thing to be aware of, pellets only at any field target match and at Ron's place.