![]() |
First Indication of a PPU Case Head Separation |
Post Reply ![]() |
Author | |
britrifles ![]() Senior Member ![]() ![]() Joined: February 03 2018 Location: Atlanta, GA Status: Offline Points: 4175 |
![]() ![]() ![]() ![]() ![]() Posted: June 12 2022 at 8:15am |
I have my first indication of an incipient case head separation in my first batch of PPU cases.
Unfortunately I have not logged the number of reloads, I suspect 30+, perhaps over 40. Had to get the lighting just right for it to show in the photo below. It does not look nearly this obvious in normal lighting. This was on the first firing after a partial length resize (I think I’ve P/L resized these cases three times now, typically get 10 to 15 neck sizing reloads between each P/L resize). I shot this on Friday at the D-Day match. I like to have the cases P/L sized for a major match, as it makes bolt cycling and lockup very fast for the rapid fire stage. I’ve been tracking the number of reloads in subsequent batches and now at 15 neck sizings and one partial length resize.
![]() |
|
![]() |
|
Sponsored Links | |
![]() |
|
Shamu ![]() Admin Group ![]() ![]() Logo Designer / Donating Member Joined: April 25 2007 Location: MD, USA. Status: Offline Points: 14800 |
![]() ![]() ![]() ![]() ![]() |
Yep that's the classic symptom! |
|
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
|
|
![]() |
|
britrifles ![]() Senior Member ![]() ![]() Joined: February 03 2018 Location: Atlanta, GA Status: Offline Points: 4175 |
![]() ![]() ![]() ![]() ![]() |
That area of the case just forward of the head undergoes a lot of plastic strain, and thins the brass. I can see it getting thin looking down the case mouth, the thin area will be in shadow if you shine a light down into the case. Hate to junk this whole batch, but that’s probably what I should do.
|
|
![]() |
|
Honkytonk ![]() Senior Member ![]() ![]() Joined: December 30 2017 Location: Brandon Mb Status: Offline Points: 4003 |
![]() ![]() ![]() ![]() ![]() |
Might just be a weak one in the batch but probably binning the rest of that batch is the way to go.
|
|
![]() |
Post Reply ![]() |
|
Tweet
|
Forum Jump | Forum Permissions ![]() You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |