I have been reloading for 20+ years and have never had the issues I am having with figuring out 10mm. Ive made 30 dummy rounds so far and only one was correct.
#1- Resize brass, fits perfectly in gauge (check)
#2- Bell the case mouth (check)
#3- Insert projectile and seat to 1.26" (check)
#4- Taper crimp and poof....I am never able to get it to crimp in a manner that allows the round to fit into the guage more than 1/2 way.
I followed the instructions for the taper crimp and even tried setting it by using a factory round. I dont know where the problem is and Im getting a little testy about it.