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124g MG JHP recipe


3djedi

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That Hodgdon data for the 125gr Hornady HAP is anomalous.  Hornady says to use their XTP data for their HAP bullets, and if you look at Hodgdon's data for the 147gr Hornady XTP, the load window is 3.2 - 3.6.  There's no way that 125gr JHP's max load is the same as the 147gr JHP's starting load.

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That OAL can't account for that data.  That bullet length is only .572, so at that short OAL of 1.069, the seating depth is still only .253.  I shoot 124gr JHPs at similar seating depths with 4.0gr of TG all day long.  There's no way a 125gr JHP is going to need a lower charge window than a 147gr JHP that is seated deeper and that has a longer bearing surface.  That's simply not going to happen.  There's something wrong with the data.  

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124 gr MG JHP over 5.0 of CFE Pistol at 1.075" OAL made ~129 PF out of my P99c, which is basically the Q5's smaller DA/SA cousin.  With 1.5" more barrel, you probably won't need quite as much powder and/or will get more velocity.  I'd start at 4.4 or so and work up as needed.

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Sierra Reloading Data Book (7th Edition) shows the following for 125g FMJ & JHP:

Titegroup:  1000fps/3.7gr, 1059fps/3.9gr, 1100fps/4.2gr, 1150fps/4.4gr (max load).

Edited by CmbtEngr
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Tested a few loads with Cfe pistol today, from 4.2-4.8. Precision Delta 124gr jhp, 1.110 oal,4.8gr  Cfe-p, average 1039fps/128pf out of my m&p 9l pro core. I am new to reloading so this was only a 5 shot group. I wanted to work up the load and only made 10 of each. Used 3 to test function and 7 for chrono. I had 2 errors when testing the 4.8gr. 4.6gr averaged 1009/125 for a 7 shot group.

Edited by BillyBlast
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1 hour ago, 57K said:

I've loaded the MG 124 and you shouldn't need to load so short as 1.075" with it. Even with a short throated barrel.

Neither my P99c nor my P99 will pass the plunk test with a MG 124gr JHP consistently with it loaded any longer than 1.075"  I'd be surprised if the same wasn't true for the OP's Q5; it's essentially a P99 with the DA functionality and the associated decocker button removed.  My full size has a *slightly* tighter throat than my compact (I occasionally get rounds that won't quite plunk in the full size barrel that will in the compact), but I doubt the Q5 is so different than either of them that it'd be possible to load significantly longer.

Edited by olstyn
grammatical clarity
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Neither my P99c nor my P99 will pass the plunk test with a MG 124gr JHP consistently with it loaded any longer than 1.075"  I'd be surprised if the same wasn't true for the OP's Q5; it's essentially a P99 with the DA functionality and the associated decocker button removed.  My full size has a *slightly* tighter throat than my compact (I occasionally get rounds that won't quite plunk in the full size barrel that will in the compact), but I doubt the Q5 is so different than either of them that it'd be possible to load significantly longer.




I think it was close to 1.115" that would pass on the Q5. I loaded my test rounds to 1.100" with no problems on the plunk test.

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I wonder what prompted Walther to change the way they cut the chambers for the Q5 vs earlier models.  IIRC earlier PPQs also have tighter chambers like P99s.  It would be interesting to know which way the 5" PPQ M2 (Non-Q5 Match) is.

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Yeah, My P99c is older (summer 2010 purchase) and has a "normal" chamber.  The full size is a summer 2016 purchase and has the stepped chamber.  The step makes a shiny ring around the brass when it's fired, but doesn't seem to cause any significant negative effects, and as far as I can tell, it's only a marginally tighter chamber than the compact.  I certainly wouldn't want to attempt to load 9 major at 1.075", but I don't shoot open anyway, let alone with a Production gun, so that's really not an issue for me.  :)

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On 1/27/2017 at 8:59 PM, jtaylor996 said:


Yes I do.

1.095" OAL
3.9gr TG

Makes minor power.

 

What PF do you get out of that???

 

I loaded 1.100" with 3.6g of TG and got 129PF out of it.  I would think 3.9g would be fairly hot.   

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3 hours ago, 3djedi said:

 

What PF do you get out of that???

 

I loaded 1.100" with 3.6g of TG and got 129PF out of it.  I would think 3.9g would be fairly hot.   

 

Do not forget that this is 9mm minor.  ALL loads are mild.  3.6gr for a PF of 129 is a light load that throws brass a couple feet.  3.9gr is going to be FAR from hot.

 

 

 

From earlier in this thread:

 

On 1/18/2017 at 9:18 PM, IDescribe said:

I've shot a few different 124gr JHP, MG included, with 4.0gr of Titegroup, down in the OAL range of 1.07-1.08, for average velocities between 1060 and 1080.  I'd recommend you start at 3.6 and work up.

 

So PF of 131 to 134 at 1.075-ish and 4.0gr.

 


 

 

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I also used this same load with Precision Delta JHP. But the COAL was more like 1.085ish. I know the COAL is short but I tested every COAL between there and 1.130" and this was by far the most accurate from 30-60'. The XTREME JHP are quiet a bit shorter than everything else. I compared the Precision Delta 124gr JHP to the Hornady 124gr XTP and the profile is almost the same. It's also moving a little faster than I'd like but anything slower and the accuracy seemed to drop way off.

Set: 232
Created: 01/15/17 10:29AM
Description: Xtreme 124gr PRN 9MM G34
Notes 1: HP 0.355 Xtreme 9mm 124 0.545
Notes 2: 4.0grs Titegroup COAL 1.060
Distance to Chrono(FT): 5.00
Ballistic Coefficient: 0.140
Bullet Weight(gr): 124.00
Temp: 56 °F
BP: 29.99 inHg
Altitude: 0.00
# FPS FT-LBS PF
9 1134 354.13 140.62
8 1152 365.46 142.85
7 1136 355.38 140.86
6 1124 347.91 139.38
5 1134 354.13 140.62
4 1119 344.82 138.76
3 1112 340.52 137.89
2 1115 342.36 138.26
1 1124 347.91 139.38
Average: 1127.8 FPS
SD: 12.5 FPS
Min: 1112 FPS
Max: 1152 FPS
Spread: 40 FPS
Shot/sec: 0.7
True MV: 1131 FPS
Group Size (in): 0.00

--------------------------------------------



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