Jaco recently wrote me on his dished base and just posted a photo on the Forum under the WRA 9M-M thread. I’ve started a new thread because I also have a dished base round with a different headstamp and thought someone can shed light on these cartridges.
Jaco’s WRA 9M-M, as you can see below has a deep dish in the case head of the cartridge in front causing the loaded round to be shorter. Jaco described it to me as:
[quote]The (magnetic) projectile is also about 1 mm shorter in compare to my known cartridges, and the casemouth has small cracks.
The tip of the projectile has some rust.
The rust on the tip indicates the steel jacket material is exposed.
When I saw Jaco’s round I was reminded of a British load from H^N in 1945.
The bullet on this load is also flattened at the tip and the steel jacket is exposed. I obtained this round from Australia or NZ in the very early 1970s, and have since seen three or four of them, all H^N headstamps though I can’t tell you they were all 1945 dates. All had the exposed steel on the tip.
My round and Jaco’s were apparently part of a column of cartridges that were subjected to considerable pressure so the projectile of the bullet behind dished the primer and casehead, and the force somewhat deformed the bullet and wiped off the GM coating on the bullet tip.
Does anyone know how this may have occured or seen this on other calibers???
I have seen a number of commercial/military loading facilities, but do not recall seeing a step where loaded cartridges were lined up in a manner where a jam would create this degree of damage. Having said that, there are many different productions setups and I am very much not an expert.
Could the damage been in the boxing/packing process???
Is there some kind of quality control process where cartridges are taken from production and compressed in this fashion???
An help appreciated.