Watch that crimp!
Another thing to watch is your crimp, use calipers to make sure your crimp isnt too hard. On auto cartridges such as 9mm, 40sw, 45, 10mm they head space on the case mouth and too much crimp will let the case slip into the bore raising pressure dramatically. I know this as a medium load in my 45acp 1911 went kaboom during my learning years of reloading. If your new to reloading I would recomend starting with a revolver round like a cheap 38spl/357 mag, they are much easier and more forgiving than auto cartridges. IMHO
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