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RMR 124 "match winner" FMJ OAL- Verify I'm safe plz (9mm)

Discussion in 'Handloading and Reloading' started by z7, Oct 27, 2017.

  1. z7

    z7 Member

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    I just received a nice box of 124g FMJ-FP "match winners" from RMR and they look awesome. I checked my hornady load manual and it called for a 1.06" oal for a FMJ FP at 124g. I tried a plunk test in my two lone wolf 40-9mm conversion barrels and had to get down to 1.062" for the dummy rds to drop in and out freely and spin without resistance. at 1.07" one barrel would hang up and not spin. 1.06" takes up a whole lot of space in that tiny case.

    I plan on starting at about 4.5g and working up to 5.5g (BE-86) or so, I wanted to see how you all have been seating them. I was loading the 115g fmj at 1.135" and they shoot great, just wanted to try a heavier bullet.

    thanks
     
  2. Walkalong

    Walkalong Moderator

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    1.060 (+/-) sounds about right for a 124 Gr flat point. I know some folks here are using that bullet, so they can share what OAL they use.
     
  3. Load Master

    Load Master Member

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    The published Hornady data is the minimum COL. In most cases you will need something longer to feed properly in your given pistol. For this bullet I use 1.110" because this is what feeds best.
     
  4. Dwb1957

    Dwb1957 Member

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    I'm shooting the rmr 124 fp at 1.08 from my g-34 with kkm barrel. Just looked thur my targets and had good groups from my sig at 1.09 ,can't remember what it plunked at but I'm pretty sure at around -.02 from plunk on all my barrels.
     
  5. bds

    bds Member

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    I have several Lone Wolf 40-9 conversion barrels and while longer OAL works for older LW barrels that have been reamed from factory, newer 40-9 barrel with no leade requires 1.080" to drop with a "plonk" and spin freely. I am using .378" taper crimp.

    [​IMG]
     
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  6. Dudedog
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    Dudedog Contributing Member

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    5" 9mm 1911

    String: 2
    Date: 10/29/2017
    Time: 9:24:40 AM
    Grains: 124
    Hi Vel: 989
    Low Vel: 946
    Ave Vel: 968
    Ext Spread: 43
    Std Dev: 16
    RMR 124 FN-FMJ 4.5 BE86 1.08 ,does not make PF
    Velocity Power Factor Ft/Lbs
    979 121.396 263.869
    968 120.032 257.973
    959 118.916 253.198
    946 117.304 246.38
    989 122.636 269.287

    String: 4
    Date: 10/29/2017
    Time: 9:26:46 AM
    Grains: 124
    Hi Vel: 1010
    Low Vel: 970
    Ave Vel: 987.8
    Ext Spread: 40
    Std Dev: 16
    RMR 124 FN-FMJ 4.7 BE86 1.08 ,does not make PF
    Velocity Power Factor Ft/Lbs
    970 120.28 259.04
    1010 125.24 280.845
    998 123.752 274.211
    983 121.892 266.03
    978 121.272 263.33

    String: 5
    Date: 10/29/2017
    Time: 9:29:34 AM
    Grains: 124
    Hi Vel: 1092
    Low Vel: 1071
    Ave Vel: 1085
    Ext Spread: 21
    Std Dev: 8
    RMR 124 FN-FMJ 5.0 BE86 1.08 5inch 1911
    Velocity Power Factor Ft/Lbs
    1084 134.416 323.506
    1071 132.804 315.793
    1092 135.408 328.298
    1088 134.912 325.898
    1092 135.408 328.298

    After a 125 PF load so I didn't go any higher than 5gr.
    Looks like 4.8 or 4.9 may do the trick for 125 PF.
     
    Last edited: Oct 29, 2017
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  7. Dwb1957

    Dwb1957 Member

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    Dude dog how was the recoil comparing the 5 gr load to a faster powder that's making power factor or comparing it to factory rounds?
     
  8. Dudedog
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    Dudedog Contributing Member

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    5gr Slightly less recoil than factory, BE86 feels less snappy to me than HP38 at the same vel. 5gr was about 50fps faster than they need to be to make PF with wiggle room.
    I like my match loads to be about 1030fps give or take.
    My favorite for match loads is WSF which is about the same burn speed wise as BE86.
     
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  9. Dudedog
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    Dudedog Contributing Member

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    Some more chrono numbers for the FN-FMJs
    All mixed range brass, S+B SP, charges as thrown after setting measure
    5" 9mm 1911 unless otherwise noted.

    String: 7
    Date: 10/29/2017
    Time: 9:15:48 AM
    Grains: 124
    Hi Vel: 981
    Low Vel: 908
    Ave Vel: 947.8
    Ext Spread: 73
    Std Dev: 28.5
    RMR 124 FN-FMJ 4.4 CFE-P 1.08 5inch 1911
    Velocity Power Factor Ft/Lbs
    968 120.032 257.973
    908 112.592 226.984
    947 117.428 246.901
    981 121.644 264.948
    935 115.94 240.684
    If you throw out the 908 AVG=957, ES=46, SD=20
    :eek: way to light to make PF but functioned fine

    String: 9
    Date: 10/29/2017
    Time: 9:20:07 AM
    Grains: 124
    String: 9
    Date: 10/29/2017
    Time: 9:20:07 AM
    Grains: 124
    Hi Vel: 1033
    Low Vel: 942
    Ave Vel: 982.8
    Ext Spread: 91
    Std Dev: 33
    RMR 124 FN-FMJ 4.6 CFE-P 1.08 5inch 1911
    Velocity Power Factor Ft/Lbs
    976 121.024 262.254
    989 122.636 269.287
    1033 128.092 293.781
    942 116.808 244.301
    974 120.776 261.181
    This load shot great but did not make PF, need to retest with 4.8
    Not quite sure what's up on round 3 at 1033

    String: 8
    Date: 10/29/2017
    Time: 10:22:03 AM
    Grains: 124
    Hi Vel: 1044
    Low Vel: 1031
    Ave Vel: 1037
    Ext Spread: 13
    Std Dev: 5
    RMR 124 FN-FMJ 4.2 Universal 1.08 5inch 1911
    Velocity Power Factor Ft/Lbs
    1044 129.456 300.071
    1042 129.208 298.923
    1040 128.96 297.776
    1032 127.968 293.213
    1031 127.844 292.645

    String: 9
    Date: 10/29/2017
    Time: 10:23:31 AM
    Grains: 124
    Hi Vel: 1112
    Low Vel: 1073
    Ave Vel: 1092
    Ext Spread: 39
    Std Dev: 16
    RMR 124 FN-FMJ 4.5 Universal 1.08 5inch 1911
    Velocity Power Factor Ft/Lbs
    1078 133.672 319.934
    1112 137.888 340.434
    1073 133.052 316.973
    1095 135.78 330.105
    1103 136.772 334.946
    (hotter than it need to be to make 125 PF, 4.2 made PF)

    String: 9
    Date: 10/29/2017
    Time: 9:05:20 AM
    Grains: 124
    Hi Vel: 1063
    Low Vel: 997
    Ave Vel: 1022
    Ext Spread: 66
    Std Dev: 25
    RMR 124 FN-FMJ 4.4 WSF 1.08 Does not make PF
    Velocity Power Factor Ft/Lbs
    1063 131.812 311.093
    997 123.628 273.661
    1019 126.356 285.872
    1008 124.992 279.733
    1023 126.852 288.121

    String: 2
    Date: 10/29/2017
    Time: 10:46:10 AM
    Grains: 124
    Hi Vel: 1066
    Low Vel: 1027
    Ave Vel: 1047
    Ext Spread: 39
    Std Dev: 12.7
    RMR 124 FN-FMJ 4.7 WSF 1.08 OAL
    Velocity Power Factor Ft/Lbs
    1032 127.968 293.213
    1027 127.348 290.378
    1044 129.456 300.071
    1042 129.208 298.923
    1053 130.572 305.267
    1056 130.944 307.009
    1044 129.456 300.071
    1066 132.184 312.851

    Looks like 4.6gr WSF with this bullet/OAL would be about right for 125 PF (5" barrel),
    4.8-4.9 with a 3", apparently I didn't save the 4.9 3" barrel results---senior moment, sorry guys
     
    Last edited: Oct 29, 2017
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  10. z7

    z7 Member

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    Thanks for the info, I loaded up several rounds with a .2g spread and hopefully I can make it to the range this week. oaL is 1.065” and plunks fine, I will report the results
     
  11. Dudedog
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    Dudedog Contributing Member

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    A few target Pics.
    I was trying a new scope mount and scope shooting from a rest to see if that helped.
    It did, however I discovered that my cheap plastic folding table is not up to the task of keeping the rest stable on uneven ground,
    so the results are not what they could have been if I would have had better support for the rest.
    Sig P226, S+B SPs, mixed range brass # of firings unknown, charges as thrown after setting measure
    (I sure thought I shot 5 at the CFE-P target but I only see 4, possible 5 went through the same hole but not 100% positive, bummer 4.6 did not make 125 PF need to try 4.7, 4.8)
    The bullets shoot well if I do my part.
    4.2Universal.jpg 4.5Universal.jpg 4.6CFE-P.jpg 4.7WSF.jpg 4.2Universal.jpg 4.5Universal.jpg 4.6CFE-P.jpg 4.7WSF.jpg
     
    Last edited: Nov 2, 2017
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  12. Walkalong

    Walkalong Moderator

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    :)
     
  13. Dwb1957

    Dwb1957 Member

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    image.jpeg image.jpeg View attachment 767166 R View attachment 767166 View attachment 767167 Shot the 124gr rmr flat point today using a g-34 with kkm barrel and a sig p-320 c.
    Load
    Cci-500 rem brass
    124 gr rmr flat point 1.082 oal
    Sport pistol 4.2 grs
    Fifteen yards rested

    G-34 group .970
    Mv 1111 Es 26 sd9

    P320 compact group 1.13
    Mv 1035 Es 42 sd 15
     
    Last edited: Nov 2, 2017
  14. Chillydog

    Chillydog Member

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  15. z7

    z7 Member

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    diggin up an old thread to update chrono data and load development. very accurate load, soft recoiling and fun to shoot. the lot of BE86 I have is a hot one, i am .7 to .9 below their max charge but I am getting an average velocity that indicates I am already pretty hot.

    9mm 124g rmr FP "match winner" 5.0 BE86 1.06" oal
    (glock 35 with lone wolf conversion barrel) and magnetospeed chrono
    Series 1 Shots: 10
    Min 1140 Max 1183
    Avg 1158 S-D 12.5
    ES 43
    Power Factor:
    min 141
    avg 143
    max 146
     
    Last edited: May 11, 2018
  16. Walkalong

    Walkalong Moderator

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    Which one?
     
  17. z7

    z7 Member

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    updated, its the FP match winner
     
  18. Dudedog
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    Dudedog Contributing Member

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    Ran into that myself, had sort of wondered if was just me. .....
    The first BE86 I had ran hot. I was getting around 1200 with a 124gr bullet and 5" barrel with 5.3-5.4gr and looking at the MAX of 5.8 going :eek: no way am I going another .5gr to 5.8.
    (Note I started well below 10% off the MAX at around 4.5 gr. on the first lot of BE86 I had, glad I did. )
    The next lot was giving me closer to 1100 with 5.3 so yes 5.8gr seemed reasonable with that lot.
    Maybe the first lot was on the fast side of the allowed range and the second was on the slow side.
    Always a good idea to rework up MAX loads when changing lots of powder.
    If I had started with the slow lot and then got the hot lot and failed to work up the results could have been bad,
    or if I hadn't checked the next lot (which was slower) and needed to make PF I would have been under PF using data from the first lot.
     
  19. wrench459

    wrench459 Member

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    "Like all Alliant Powder offerings, BE-86 provides superior lot-to-lot consistency."
    So this statement is for not?
     
  20. Dudedog
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    Dudedog Contributing Member

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    I haven't used that much BE86.
    First two lbs were the "hot" lot. If I remember correctly BE86 had not been out long when I got them.

    The 3rd lb I picked up maybe a year later was "normal".
    The 4th lb purchased may 6 months later seemed about the same as the 3rd.
    So 3 and 4 were consistent, and since I have such a small sample I can't really say for sure how it is normally.
    I sure there is an allowed tolerance in burn speed lot to lot and it could just be the one lot I had was on the edge of the tolerance allowed.
    I probably should have got the lot number from the first ones and emailed Alliant to see if they had any other reports of it being hot, but hindsight is 20-20.

    z7, is the lot you currently have hotter than some others you have used?
     
    Last edited: May 12, 2018
  21. Walkalong

    Walkalong Moderator

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    I have only had one pound of BE-86, and judging by my results in 9MM with a 124 Gr bullet, I would have to say if there was a 'hot" lot, I've got some of it. Unusual that Alliant would make such an error.
     
  22. z7

    z7 Member

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    I have only tried one lot, but I am seeing hotter numbers then most it seems
    I purchased an 8 lb jug after it came out based on discussion here, too a leap of faith because it was during the powder drought and I was tired of always looking for powder, it has performed great, but after I got my chrono I am getting speeds higher than expected in 40 and 9mm, if I start at 10% low and work up, I am getting near max velocity at the “starting” load in 40 and 9mm

    I like the powder and my es/sd are pretty tight, especially considering mixed brass from public ranges
     
  23. Dwb1957

    Dwb1957 Member

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    Some of the extra vel is because of the shot oal 1.06. I shot some loads of sport pistol today that dropped about a 100 fps. I went from a aol of 1.083 to 1.133 and I lost about a 100 fps I knew would be slower but I didn't think it drop that much but it did unless my crono is lying lol.
     
  24. z7

    z7 Member

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    I think that is probably accurate, it’s amazing how such a small change in length can impact volume and pressure
     
  25. vaalpens

    vaalpens Member

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    I have done very limited load workup in 9mm using the RMR 124gr FMJFP bullet since I have been using it mostly in 357sig. This will change though since I picked up some more of them with the last 10% discount sale. My first load workup will be using PowerPistol since I like PowerPistol in 9mm.

    Following was my most accurate load in in 9mm with this bullet using BE-86. The accuracy was not very good, but it is a work in progress for me. Please note that I load mine with a COL of 1.065". Testing is done @15 yards using a rest:

    9mm, SP2022, 3.9"
    Case: Blazer
    COL: 1.065"
    RMR, 124gr, FMJFN, BE86, 5.5gr, CCI500
    Average: 1092
    ES: 11
    SD: 4
    Force: 328
    PF: 135
    Velocities: 1087, 1091, 1091, 1093, 1098
    Grouping @ 15yd: 0.92"
    Test Date: 09/15/2017
    Load-901-05_15yd.png
     
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