Operating and Maintenance Manual
25 |
P a g e
D e c a p p e r O & M M a n u a l R e v D
➢
Why do the Decapper pins break?
The Decapper pins will break for a variety of reasons. These are usually from
rocks, smaller cases (0.22 cases are common) inside your cases, Berdan
primer cases and a few case manufacturers make cases with primer flash
holes that are off-centre. The decapper machine is accommodating, but
there are limits. If you are likely to see Berdan primer cases, running the
decapper at ½ speed will usually result in the decapper stalling BEFORE it
breaks the pins.
If the primers are not pushed out fully, they WILL tip over and jam the exit
chute. Also primers that are pushed out AND are then pulled back into the
primer pocket will catch on the primer discharge hole and tip over.
The common causes from this are wet cleaned cases with primers in and not
dried correctly (or quickly), soft pistol primers in crimped cases, 9mm major
cases or lead-free primers are a known problem.
Range find brass which has been exposed to rain / snow etc are often the
major cause. Adjusting the decapper die up or down slightly will often help.
Cases that fall over after decapping are usually from the following reasons;
o
Corroded primers can stretch and occasionally be pulled
back into the primer pocket. If this occurs on a regular basis,
you may need to replace or modify the wear plate per the
photograph above. The modified wear plates have a 6mm
wide x 3mm deep slot between the primer hole and the case
drop hole. This modification could be done by your local
machinist easily. Or you can order online from Rollsizer.com.
o
If the cases are not being stroked fully into position by the
case pusher, the ejected cases can then fall over. The stroke
length can be checked and adjusted by the process in this
manual.
➢
How do I replace the guide rod?
