vaalpens
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- Joined
- Aug 14, 2014
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So I am starting another bullet PIF journey thread.
This week I received some PIF bullets from Ghost In The Fog and will use this thread to post my load decisions and results. Normally I am able to get loads worked up and tested within a few weeks, but this time it will probably be dragged out since chrono test location in the national forest has been closed for the summer due to the high fire risk.
Following are the steps I normally perform after receiving some PIF bullets:
Zero 9mm 125gr JHP
Weight: 125.2gr
Length: .562"
Diameter: .3555"
RMR in-house 9mm 124gr JHP
Weight: 123.6gr
Length: .557"
Diameter: .356"
The decision has been made to load these bullets in 357sig. I will compare RMR's to the first batch in-house RMR JHP's I have, and do my normal chrono, accuracy and expansion test for the Zero bullets.
Using the measurements of the Zero bullet, I was able to determine that the bullet should work in 357sig, with a targeted COL of 1.135". Withe the 1.135" COL there should be a sufficient gap between the start of the ogive and the case mouth.
Using the Zero bullets, the next step was to create two dummy rounds and put it through a few setback tests. here are the results and the dummy round:
Plunk test: passed
Cycle setback test: I did 4 manual cycles with one round going from a COL of 1.135" to 1.1345", and the second round from 1.1355" to 1.1350". Both passed the test.
I then used the rounds and pushed them on a bathroom scale to around 20lb pressure, held for about 5 seconds. There was no setback on any one of the rounds, so another pass.
I still need to do a detailed comparison between the old and new in-house bullets and verify that the new bullets will work in 357sig. I don't foresee any issues with fit in the 357sig.
Once the RMR's have been checked for fit, then I will decide on my loads and test them. Currently I am leaning towards loads with one or more of the following powders: BE-86, Longshot, CFE Pistol
This week I received some PIF bullets from Ghost In The Fog and will use this thread to post my load decisions and results. Normally I am able to get loads worked up and tested within a few weeks, but this time it will probably be dragged out since chrono test location in the national forest has been closed for the summer due to the high fire risk.
Following are the steps I normally perform after receiving some PIF bullets:
- Take measurements
- Decide on the target caliber
- Do some caliber specific fit evaluation
- Decide on the loads
- Evaluate the loads
Zero 9mm 125gr JHP
Weight: 125.2gr
Length: .562"
Diameter: .3555"
RMR in-house 9mm 124gr JHP
Weight: 123.6gr
Length: .557"
Diameter: .356"
The decision has been made to load these bullets in 357sig. I will compare RMR's to the first batch in-house RMR JHP's I have, and do my normal chrono, accuracy and expansion test for the Zero bullets.
Using the measurements of the Zero bullet, I was able to determine that the bullet should work in 357sig, with a targeted COL of 1.135". Withe the 1.135" COL there should be a sufficient gap between the start of the ogive and the case mouth.
Using the Zero bullets, the next step was to create two dummy rounds and put it through a few setback tests. here are the results and the dummy round:
Plunk test: passed
Cycle setback test: I did 4 manual cycles with one round going from a COL of 1.135" to 1.1345", and the second round from 1.1355" to 1.1350". Both passed the test.
I then used the rounds and pushed them on a bathroom scale to around 20lb pressure, held for about 5 seconds. There was no setback on any one of the rounds, so another pass.
I still need to do a detailed comparison between the old and new in-house bullets and verify that the new bullets will work in 357sig. I don't foresee any issues with fit in the 357sig.
Once the RMR's have been checked for fit, then I will decide on my loads and test them. Currently I am leaning towards loads with one or more of the following powders: BE-86, Longshot, CFE Pistol