From compiling the equipment lists for the matches here in AZ.....
Red Wolfs are often at or near the top.
A certain .30 Impact also has more than one win under it's belt.
Centercut has also had some success with a .30 Bobcat, (pre-liner era Bobcat, so it has an actual barrel).
On the national XFT Grand Prix circuit, I believe the two shooters currently with the highest points are Red Wolf Shooters, .22 to be exact. But a .25 Red Wolf would be up there in the points system too, had Ben not precluded himself from gaining points here at the AZ XFT Grand Prix.
You mentioned a predilection for non-electronic though. Which makes the previous suggestions of a RAW pretty viable. I read where you didn't like the trigger on your Red Wolf so maybe even one of the high powered Brocock's would be an option for you, as they typically have more of a "hunting trigger."
Also, Zx10wall has been having long range success with a juiced up Vulcan 3 .22/700mm barrel and a .30 Kalibrgun Cricket 2 Tac.
I personally use a Veteran Long .22 that has been rebarrelled and I know you like the platform, owning a Standard. I wouldn't recommend a Veteran for XFT though. By design, they're not necessarily high power guns and mine took some work to get it where it is (and I still shoot at 15-20fpe less than the Red Wolf's that are often winning, and I have an even greater power deficit when compared to the .25s and .30s I mentioned above).