Primer Body Construction and Strength
Jan 31, 2015 18:33:55 GMT -5
Post by Deleted on Jan 31, 2015 18:33:55 GMT -5
Maybe you can teach an old dog new tricks...
I have been using CCI-M 209 primers for so long I had to try a different brand to mix it up and see if I could/would get better/different results in the longer range shooting.
First off I haven't used Federal 209A primers at all with the T-Rex loads I shot with the .45's.
Much slower powders, heavier bullets and higher/longer peak PSI curves put the 209 primer to the test.
One thing I noticed when shooting 135 grains of IMR4831 with the 327 MH, is that with the CCI-M, when the primer body base bulges a little it bulges in a more round fashion. Like a small O-ring
Now since I started using Federal 209As the primer body base bulging is minimal to non-existent. And if the primer body does bulge, it's in a more angular or ramped fashion. And not rounded like a small O-ring.
In other words, when a CCI-M primer bulges at the base, the bulging seems to be more pronounced than with the Federal 209A.
I've read that the Federal primers are hotter than the CCIs to does that remove that variable from the equation?
So it leads me to this question...
What are the materials used to make CCI-M primer bodies and what are the materials used to make the Federal 209A primer bodies?
Because the Federal 209A body holds up better to the higher pressure loads than the CCI-M primer does.
Is there any way to test and compare the side wall and overall crush resistance of the Federal to the CCI primer?
I suppose a guy could cut some spent primers in half to see if the wall thickness is thicker in the Federal primer.
If the Federal primer wall is not thicker, then it has to be material that it is made of is a stronger material, right?
Your thoughts?
I have been using CCI-M 209 primers for so long I had to try a different brand to mix it up and see if I could/would get better/different results in the longer range shooting.
First off I haven't used Federal 209A primers at all with the T-Rex loads I shot with the .45's.
Much slower powders, heavier bullets and higher/longer peak PSI curves put the 209 primer to the test.
One thing I noticed when shooting 135 grains of IMR4831 with the 327 MH, is that with the CCI-M, when the primer body base bulges a little it bulges in a more round fashion. Like a small O-ring
Now since I started using Federal 209As the primer body base bulging is minimal to non-existent. And if the primer body does bulge, it's in a more angular or ramped fashion. And not rounded like a small O-ring.
In other words, when a CCI-M primer bulges at the base, the bulging seems to be more pronounced than with the Federal 209A.
I've read that the Federal primers are hotter than the CCIs to does that remove that variable from the equation?
So it leads me to this question...
What are the materials used to make CCI-M primer bodies and what are the materials used to make the Federal 209A primer bodies?
Because the Federal 209A body holds up better to the higher pressure loads than the CCI-M primer does.
Is there any way to test and compare the side wall and overall crush resistance of the Federal to the CCI primer?
I suppose a guy could cut some spent primers in half to see if the wall thickness is thicker in the Federal primer.
If the Federal primer wall is not thicker, then it has to be material that it is made of is a stronger material, right?
Your thoughts?
