I sort of have my Marlin XT set up for this, I just need to find some ammo that has consistent speed. All the run of the mill shit won't group worth a damn at 100m, so I would say it is next to useless beyond say 150m. I might buy some Lapua to try but it starts to erode the idea of a .22 trainer when you are paying the same price as .223 ammo...
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