Author: britrifles
Subject: Where has all the Powder gone?
Posted: July 04 2020 at 7:25am
Thank you Richard.
Subject: Where has all the Powder gone?
Posted: July 04 2020 at 7:25am
Thank you Richard.
I’m logging the number of reloads on a 50 case batch of PPU fired from the 0L No. 4 Mk 1/2. So far, these cases have had 7 reload cycles neck sized with the Lee collet die. No perceivable growth in case length.
On another batch of 100 PPU cases fired thru my 69L No. 4 Mk 1/3, I estimate I’m at about 15 reloads that have been neck sized. Also cases are under 2.222 and the bolt still closes freely, just a slight bit of resistance in the last 5 deg or so. I’ll probably be FL sizing these cases after a few more neck size cycles.
These PPU cases are holding up well.
I’ve noted that the chamber length in my 69L is quite long. I’ve been monitoring a old batch of 1943 Defense Industries brass that I have let grow after many neck size cycles and a few F/L resizes. The bolt still closes freely on empty cases measuring 2.231 inches. I keep my brass sorted separately for each No. 4 .303, so I will allow the cases to get to 2.230 before trimming to 2.225 on this rifle.