Please can someone explain why my .308 cases lose length after firing?
You will see from my previous threads that I am a relative learner to precision reloading. However, my approach to the matter has been logical and thorough.
The below-mentioned was performed on donated once-fired (by A-Another person) FC cases:-
After de-capping and cleaning, I full length resized.
I then trimmed to 2.005. Brass was definitely trimmed evidenced by the swarf produced. I repeatedly checked the length>
This process was performed after the second firing. I am sure that the cases were 2.005 for the 3 firing.
Today, I prepared 22, 3 times fired cases. When I checked them, most of the were 2.002, some were 1.997!!!!
I HAVE NOT ALTERED MY TRIMMER! (Please believe me)
What is causing my cases to shrink? (I can get Viagra for another shrinking problem
but can anyone give a reason for this problem?
Many thanks in advance.
Cam
You will see from my previous threads that I am a relative learner to precision reloading. However, my approach to the matter has been logical and thorough.
The below-mentioned was performed on donated once-fired (by A-Another person) FC cases:-
After de-capping and cleaning, I full length resized.
I then trimmed to 2.005. Brass was definitely trimmed evidenced by the swarf produced. I repeatedly checked the length>
This process was performed after the second firing. I am sure that the cases were 2.005 for the 3 firing.
Today, I prepared 22, 3 times fired cases. When I checked them, most of the were 2.002, some were 1.997!!!!
I HAVE NOT ALTERED MY TRIMMER! (Please believe me)
What is causing my cases to shrink? (I can get Viagra for another shrinking problem

Many thanks in advance.
Cam