This is an old thread, but found it while trying to sort a load for my 9mm CZ. Using 124gn Heavy Plated bullets and AP70N. I started and 3.8gn and only got 675fps and of course gun that didn't cycle. Jumped up to 4.3gn, but then had some crony issues. Will shoot these at the range along with some 4.5gn loads. I've NOT crimped any of these.
I've read plenty on AP70N with 124gn bullets and some folk are stating they are starting at 3.8 or 4.0 and getting Minor Power Factor, yet I'm struggling. What gives?
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