I bought a two pack of Burris scopes and wanted the SFP for a hunting rifle. I accidentally put it on the .22 and shot it for a while. I realized my mistake and put the FFP on the .22. I tried to get a 50yd zero but can’t. I can’t even use the hold unders. I’m basically holding the bottom of the post just under the target. Should I even care if I can’t get a 50yd zero? Is everyone zeroing at 100?