17 Fireball

[L-46]

Have you tried to run a neck expander mandrel through the necks before loading???

Crooked or dinged necks....I`m guessing your using Rem. brass.....

I expand and turn all my brass, so I haven`t ran into this YET.....

Phil Do you know what your diameter of the expander mandrel is ? .173 or .174 diameter. That's gonna be my next purchase.

Not sure that will help,
+1 on the previous suggestions, forming the 17 cal case neck will induce some case hardening in the brass. Some factory brass is annealed, some not. Also consider a bushing neck die so you can control the amount of neck tension, if you feel you have too much. With some cartridges 2 thou tension will give you the same grip as 4 on another case.
Not saying that 4 or more is no good, just most accuracy shooters would agree that 2-3 is what to aim for. Another option is to thin the brass neck, to reduce the tension, but this may not be a solution if your have more than 4-5 thou neck clearance in your chamber already.
Good Shootin!
L-46