Huskerguy
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Lefty
Did you get the results you were looking for? What all did you change and how?
Did you get the results you were looking for? What all did you change and how?
124gr OAL data help
- Thread starter LeftyTSGC
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repost with attachement
I completed my testing and found that for my specific 9mm (STAR 30M):
I will use a 1.160 OAL, loaded with 4.6gr W231. this will give a velcoity average 1039+/- (still need to confirm). This will be my minor PF load. (124gr MG CMJ), my 10yd shot groups were 1 - 2inches. At 25yds it moved to 2 - 4inches. This is based off of the averages on the attached data sheet. 4.5gr W231 comes in at an average of 1007-1013fps but does not make minor PF.
I will most likely plink with 4.5gr W231. While .1 grain may not seem like a lot, I have noticed that in 9mm it does play a factor. My velocities varied between 995 - 1026fps. I could even go lower for a plinking round.
yes the data shows that i achieved an average velocity of 1039fps with 4.5gr W231 with a OAL 1.125, but the accuracy of that load is bad. So when i changed the OAL to 1.160 the velocity changed as can be seen on the data chart. My main goal was to achieve accuract first, them worry about making minor.
A 9mm round resting at an OAL of 1.160 does look odd compared to most other loaded 9mm. But my 9mm is mil spec, mil spec (NATO) 9mm is built to a AOL of 1.165, so this is not so far off. Using MG CMJ there is still a lot of bullet to crimp with.
I will eventually try different powders, i wanted to get established with one powder and load as a base before this noob reloader wanders to far off the path.
So, 124gr MG CMJ, 4.6gr W231, OAL 1.160 will be my main load. (mixed brass, mostly WIN).
Any one looking for other information i may have not posted, please let me know.
I completed my testing and found that for my specific 9mm (STAR 30M):
I will use a 1.160 OAL, loaded with 4.6gr W231. this will give a velcoity average 1039+/- (still need to confirm). This will be my minor PF load. (124gr MG CMJ), my 10yd shot groups were 1 - 2inches. At 25yds it moved to 2 - 4inches. This is based off of the averages on the attached data sheet. 4.5gr W231 comes in at an average of 1007-1013fps but does not make minor PF.
I will most likely plink with 4.5gr W231. While .1 grain may not seem like a lot, I have noticed that in 9mm it does play a factor. My velocities varied between 995 - 1026fps. I could even go lower for a plinking round.
yes the data shows that i achieved an average velocity of 1039fps with 4.5gr W231 with a OAL 1.125, but the accuracy of that load is bad. So when i changed the OAL to 1.160 the velocity changed as can be seen on the data chart. My main goal was to achieve accuract first, them worry about making minor.
A 9mm round resting at an OAL of 1.160 does look odd compared to most other loaded 9mm. But my 9mm is mil spec, mil spec (NATO) 9mm is built to a AOL of 1.165, so this is not so far off. Using MG CMJ there is still a lot of bullet to crimp with.
I will eventually try different powders, i wanted to get established with one powder and load as a base before this noob reloader wanders to far off the path.
So, 124gr MG CMJ, 4.6gr W231, OAL 1.160 will be my main load. (mixed brass, mostly WIN).
Any one looking for other information i may have not posted, please let me know.
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LiveLife
Member
Thanks for the update.
Using the longest working OAL for your barrel will minimize high pressure gas leakage around the bullet resulting in more consistent chamber pressures and muzzle velocities which will improve accuracy.
Different barrels have varying leade lengths as to the start of rifling. If your barrel has slow start of rifling, using shorter OAL will leak more high pressure gas around the bullet before the bullet's bearing surface engages the start of rifling and result in less consistent chamber pressures.LeftyTSGC said:
Using the longest working OAL for your barrel will minimize high pressure gas leakage around the bullet resulting in more consistent chamber pressures and muzzle velocities which will improve accuracy.
Looks like you found your match load. W231/HP-38 is more sensitive to temperature changes than some other powders like Titegroup (velocities rise and fall with temperature changes) so many will load to 130 FP to ensure they meet the 125 FP regardless of the temperature.
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I have also had some similar COL issues in my XDM9 with cast bullets...
I have some falcon RN that would not eject manually when i attempt too by Hand... they still shot Fine..
I had to take my COL down to 1.11 or 1.10 to fix this....
Now I also have some 115gr Berry FN... I have not had any COL issues with these Bullets... usually at a 1.13 to 1.14 COL
I have been using Tightgroup on all my 9mm Loads
4.3gr and 4.6gr have worked great... 4.6gr was a bit hotter than needed, some exceeded 1200fps but no sign of any pressure issues.. so all are loaded at the 4.3gr now
I have some falcon RN that would not eject manually when i attempt too by Hand... they still shot Fine..
I had to take my COL down to 1.11 or 1.10 to fix this....
Now I also have some 115gr Berry FN... I have not had any COL issues with these Bullets... usually at a 1.13 to 1.14 COL
I have been using Tightgroup on all my 9mm Loads
4.3gr and 4.6gr have worked great... 4.6gr was a bit hotter than needed, some exceeded 1200fps but no sign of any pressure issues.. so all are loaded at the 4.3gr now
Update
After loading around 600 rounds at the above load. I realiized that i am probably using too hot of a load. See my other thread:
http://www.thehighroad.org/showthread.php?t=722354
I have been flattening primers like crazy and decided after all my testing and discussions to use 4.4 gr of W231 in my loads.
After loading around 600 rounds at the above load. I realiized that i am probably using too hot of a load. See my other thread:
http://www.thehighroad.org/showthread.php?t=722354
I have been flattening primers like crazy and decided after all my testing and discussions to use 4.4 gr of W231 in my loads.
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