Basically you are shooting a big arse subsonic .22 so the performance will match that. I dont know what bc you are using or your input values but I shoot a bit of cast stuff through lever actions and zero at 100 which gives me a bullet thats 4 inches high at 50 and 4 low at 130.
There are a few good keen sub shooters here using the 45/70 "mans cartridge" at long range who will no doubt chip in.
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