oversize bolts

I've been getting bolts from Popperts with oversized cams.

If anyone knows how to fit these I'd be interested in hearing about it. I've ruined a couple. While the last two worked it'd be nice to have a method. The shop manual seems to assume the bolt cam is already pretty much how it should be (with minor modifications).

Here's some pictures comparing to a bolt I pulled out of a python. You can see the cam is bigger in every way.