One of the nice things about the Talon/Condor rifles is the ability to easily and quickly change calibers and power level just by swapping out a barrel. BUT, different barrels and/or calibers will probably need different settings, so keep it adjustable, no red loctite.
Slightly different subject, but if you're not willing to spend $100 or less on a chrony, I wouldn't suggest you buy an Air Force rifle. If ever there was an air rifle that could be said to need a chrony, this is it. Sure, you can shoot them without one, but you will NEVER get the best performance from one of these guns until you spend the time with a chrony to really dial it in. And like all air rifles, every one is an individual, what works for mine might not work for yours, so using someone elses settings might get you in the ball park, but it probably won't be a home run. Of course, that's JMO, but I'll bet most of the other Talon/Condor owners on the forum would agree. Later.
Dave