I don't see how that matters. Just re-sight in the scope. It's not like you're swapping barrel lengths all the time. When I went from a 600 to 700 mm barrel I had to re-sight. But I was also getting more FPS.The thing is, what some say is that an extra 100mm of barrel will cause the pellet or slug to stay longer in the barrel and might send it to a different POI than the shorter barrel. So the question is not if there is some sort of recoil or push back, but will that extra 100mm barrel length change the POI as compared to the shorter barrel. I cannot imagine that.
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