Should a tuner be in my future?

Yes, Ron Hoehn makes tuners to fit your 920 barrel, I have one myself that I use on my 17 and my 10-22. I have one of his 5 oz models (2nd generation) and works on both of my rifles. I would get an 8oz model for that size barrel (1st or 3rd gen) the 3rd gen can have extra weight added if you think it needs it later. Is it worth it? Well that depends on what your looking for. For me, yes they are worth it. It will make good ammo shoot better, but will not make bad ammo shoot good (hope that makes sence). As far as the info needed from you. You will need to measure your outer dia of your barrel at as close to the muzzle as you can, 1" back, 2" back and 3" back. Since your barrel is a straight non taper, it will be straight bored to fit on. The 4 seperate measurment is for a tapered barrel so that it can be bored to fit that specific taper. Still you want to get those measurements so that just in case it is a few thousanths smaller at the muzzle than at 1" back, he can bore to the bigger dia. so it will just slip on and then tighten down. They can be bored slightly oversize because they have a small amount of take up in the clamp built in. I hope this makes sence, it is hard to explain. Give Ron a call and he will walk you thru it. He is a very nice guy and will make sure that you get what you want, plus he is fast. I have ordered one at 3 pm on one day and had it in hand the next (I just live across the state from him). I have heard that Scott is a real good guy to deal with also, but I have never delt with him so I have no first hand knowlege. Good luck...