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

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.

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.

z7 said:

124g FMJ-FP "match winners" from RMR ... 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.

I wanted to see how you all have been seating them.

Click to expand...

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.

Dudedog said:

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.

Click to expand...

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?

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.

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
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

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.

View attachment 767166 RView 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

the lot of BE86 I have is a hot one,

Click to expand...

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 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.

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

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?

z7 said:

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

Click to expand...

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.

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