N/A .22 slugs high shot count

Have a question. Is there a .22 slug shooter that maintains a high shot count. I have a avenger .25 i get about 20 shots per fill very accurate and good power to 50 to 60 yards.and a vulcan 3 hp .30 get about 20 shots per fill excelent power and range. It would be nice to have a gun to fill and shoot for an extended period. I would prefer to push slugs as they seem to be better at longer ranges 75 to 150 yards. I would like to maintain budget friendly and not opposed to used. Im just wondering
 
My FX Panthera will give a really good shot count with a very effective slug tune. It’s not exactly budget friendly but that depends on your budget I guess. My Panthera is a .22 with a 600mm barrel. I added a second bottle up front and a K&L arca rail to protect the bottle and provide a means to mount a tripod. I have a total of 780cc of onboard air. You can even go to a longer tank up front if you need even more air. My tune gives me 955fps with the H&N 30 grain HP2 slug. I get just over 70 shots with this set-up. This is one of the most consistent and accurate air rifles I have ever owned. One drawback is that it is heavy. It’s definitely best shot from a bench or a tripod/ bipod.
Kenny
 
the more power you want to have the more air it’s going to take. That’s more than evident. There are a lot of bottle guns that maintain a high shot count at reasonable power. In .22 I’d stick to 30 grain or less and pick a rifle with a non choked barrel. Possibly a RAW HM1000X if that’s too rich I’d look at the Kral bighorn , it’s not regulated but has a fair size bottle that can be changed out to 700cc ( they both can actually)