I have a 270 win I’m trying to tune some loads for. I used the Hornady tool to find the lands and while pushing it in I stopped at the first point of resistance, ran a ladder .020 off but the rifle still won’t group. So I thought I would check the measurement again and decided to push a little harder. The bullet slid in more and then hit a hard stop. The new measurement which I checked over and over with the same result and the jump turned into 180 thou. I really don’t think this is right. I’ve used this tool on a dozen rifles and this seems to be the only one I’ve had trouble with. Looking for opinions, advice etc.
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