I’d get in touch with Jim Gaska at wicked air rifles . I wouldn’t worry about a TJ’s barrel getting fouled without lubing . A couple drops of 10w shock oil in every tin of pellets should do the trick .
I was gifted a .22 Maximus barrel and the quality, maybe just lucky, was way better than the stock Disco. For 50 yards the stock barrel will usually shot better than the shooter. It’s not all about power but rather shot placement that count. I’m sure others will chime in
For a given FPE level, you will find it a lot easier to get with a .25 cal instead of a .22 cal.... I have not had a lot of success with the 34 gr. Beasts in .22 cal, but the Redesigned 25 gr. Monsters in .22 cal are very good.... In .25 cal, both the .25 gr. Kings and 34 gr. King Heavies are very accurate.... Bottom line is that from the same powerplant, you will get a similar velocity ( but more FPE) with a 34 gr. in .25 cal as you will with a .25 gr. in .22 cal.... The choice will come down to how much power do you need?....You can't go wrong with the LW barrels in either caliber.... If you are going to use a Disco receiver, you will need the 12mm OD version, and then turn down the breech end to fit into the receiver.... Roy at Mountain Air can probably supply that in .22 or .25 cal.... Heck, in .22 cal I would just use the Crosman barrel, some of them are very accurate, it's worth playing the lottery unless you know yours is a dud.... The TJ's barrels are available in 7/16" OD in both calibers, which will slide right into the Disco receiver.... Jim at Marmot Militia can supply them, ready to install.... Either way, you should have good accuracy....Bob
The .25 will shoot a heavier bullet at the same velocity as a .22.... HOWEVER, it will use more air doing it.... you don't get something for nothing.... The base area of the .25 cal pellet is 29% larger than a .22 cal, so there is 29% greater force available to accelerate it from the same air pressure.... Assuming you scale the port sizes appropriately to move the larger quantity of air required for the larger bore, you should be able to drive a 34 gr. pellet in .25 cal almost as fast as a 25.4 gr. pellet in .22 cal.... The downside is that you will use about 29% more HPA per shot to fill the larger barrel volume....Bob
TJ's barrels aren't bad at all but it takes some effort to have them working good, they are quite rough at first. Firelapping is mandatory. After that well done there is no fouling problem(really close to none) and accuracy is good. As new they are fouling a lot in my experience of several ones.As of now, I am not cleaning my Corsair .308 barrel at all. I better not. If I do, it takes about 250 shots to get it shoot again. Thousands of shots for sure.
Travis, are you looking for a powerhouse or a stock shooter in another caliber?Powerhouse drop in parts are available for the disco, Cothran Valve, JSAR barrel (LW non-choked for slugs) MM barrel rocks JSB 18gr pellets like crazy.
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