Short answer, yes. Long answer, it takes time to set it up for 2 ammo options, and 2 velocities. You would need something that’s easily tunable externally. Something like an fx, or a huben where a quick turn of a dial will give you a different velocity. Huben would be your easiest, but my crown is set up to shoot 18gn jsb at hammer speed 19, and I can crank it to 23 and shoot 20.2 nsa accurately also.
In this example, you're really describing situations calling for standard vs high power performance. A HP rifle with an adjustment wheel would allow different power levels, although not really different tunes. The best solution might be an electronic rifle in HP version, using the lower settings for lighter pellets. You would need to be aware of the different POI at different settings and with different pellets or slugs. The easier solution, just use the HP setup and accept a bit of overkill on the smaller targets.
MY Leshiy Classic i can loosen two set screws and slide a different barrel in place and shoot .177 to .25 boom. so i was wondering about the options in a FX type gun with external knobs but of course no Cal. change , Thanks
The classic can also be somewhat tuneable on the fly as long as you have an Allen with you. Its hammer is externally adjustable, and has clicks you can count to know what velocity you’re shooting after testing. I used to do this with mine. I’d shoot 22cal hades, and then swap the barrel to 25cal, and click the hammer up for the velocity I wanted. Once I figured the clicks out, it was very repeatable.
Really i was not saying to use it . Just wondered IF . A situation where you have been after the FOX for a while (lost a few of your herd) and the opportunity presents itself . but of course you had practiced some on targets , i was not saying doing this cold , no idea of holdovers .
I have an FX Impact in .30 and would say that you could do it in theory, but because the barrel's are very "sensitive" to huge harmonic swings, it may not be feasible for accuracy. That gun has a noticeable change in impact with different ammo (with a scope change needed). I do know there are gun's capable of what you are inquiring about though. Because of the ballistic coefficient difference between a pellet and heavy slug you could do it with little more than a slight holdover change at a given yardage. Just last week I tested this type of ammo change in my AAA Evol .30 with pretty good success by only changing the weights of ammo and not the tune setting. I went from Hades pellets on up to NSA 61.5 grain slugs with only a slight change in holdover needed in the heavier but flatter shooting slugs. The scope zero was at 40 yards and out to 45 yards the POI was within a few tenths of an inch difference. This is possible with the Evol because of the quality and robustness to the barrel system, even though it was tuned for power. The test wasn't really going from pesting weight and speeds tune to a heavier slug and tune like you are interested in.
