I use Sinclair chamber length gauges, have for over thirty years. They're inexpensive and give an accurate reading. You'll need calipers though.
https://www.youtube.com/watch?v=JKnXJxaAw2U
Type: Posts; User: 10-Ring
I use Sinclair chamber length gauges, have for over thirty years. They're inexpensive and give an accurate reading. You'll need calipers though.
https://www.youtube.com/watch?v=JKnXJxaAw2U