If I wanted to test the limits of my reloads by adding .2 a grain of powder until I hit the maximum limit for the different powders I'm testing, what pressure signs should I look for first? Thanks, Joe
Pressure signs
- Thread starter Joe Perlo
- Start date
Thanks. Why would there be ejector marks? Sorry if this is a dumb question, I just don't know. Joe
^^^^^^^^^^^^^^^
What they said. Primers are also an indicator but not the best. If your pressures are high enough to make the primer look like it's just a continuation of the case head, with no remaining radius at the edges at all, you might want to also back off. That said, soft primers can give false pressure indications while bolt lift and ejector marks are definitely telling you "TOO MUCH".
It's also a good idea to do this development work with a chronograph. If you start working into speeds that are way higher than published speeds you are more likely than not getting close to the limits. Besides, it's nice to have that data for later use. Why do the work twice?
I did one load workup using 5 rounds per charge, a chronograph, and targets set at 300 yards. I was then able to select the best SD/ES, Group size, and loads with no pressure signs. The whole "Map" in one session.
What they said. Primers are also an indicator but not the best. If your pressures are high enough to make the primer look like it's just a continuation of the case head, with no remaining radius at the edges at all, you might want to also back off. That said, soft primers can give false pressure indications while bolt lift and ejector marks are definitely telling you "TOO MUCH".
It's also a good idea to do this development work with a chronograph. If you start working into speeds that are way higher than published speeds you are more likely than not getting close to the limits. Besides, it's nice to have that data for later use. Why do the work twice?
I did one load workup using 5 rounds per charge, a chronograph, and targets set at 300 yards. I was then able to select the best SD/ES, Group size, and loads with no pressure signs. The whole "Map" in one session.
As stated above ejector marks and sticky bolt is what I really pay attention to. I look at primers, but they can deceive. Be safe and go slow.
Thanks for all the advice. I will go slow, no crony yet (on my short list). Just wanted to make sure I don't do any damage. Joe
