BE86/RMR 9mm journy.

[Axis II]

Well I figured I would share this with you guys and maybe help fellow reloaders out and get a question or two of my own answered. I began today loading Alliant BE86 and RMR 124gr RN, mixed brass, S&B SPP with my LCT and Lee auto drum. I was a little skeptical at first with Alliant stating reduce the 5.8 charge by 10% which brought me to 5.22 rounded up to 5.3gr. The LAD threw each charge with the utmost precision and I hate to say it a little more precise than HP-38. Upon the first throw to check on the scale I said to myself man that's half if not more of the case full of powder. I kind of like that so its easier to see. I checked a few rounds using the plunk test at 1.150 and started at 5.3, 5.4 and 5.5. and had every intention of testing them today but a few things came up.

I noticed a few things I would like your opinion on. Is this a very dirty powder? I noticed when I put my Lee funnel on the powder jug to pour the remaining powder back into it there was dust coming from the powder being poured and it left a lot of black residue on the Lee funnel. Does anyone else think the 5.3-5.8 is a little short? I used this data from Alliants website for 124gr FMJ.

CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.. All data was recovered from www.alliantreloading.com.

 

[z7]

I have done a workup with this exact combo and I ended up settling at 5g overall. I liked the way it felt. now I was working up with a lone wolf 9mm glock conversion barrel that plunked at 1.06" so substantially shorter than what you have. I worked all the way up to 5.7g without any issues. 5.7 was snappy but I don't have a way to chrono my 9mm loads yet so i don't have any velocity data, just based my observation off of the recoil and the ejection, 5.7g threw the brass about 10ft away to my 4 o'clock, pretty aggressive a glock in my experience. If you get any velocity numbers i'd be interested to hear what you get

what sort of gun are you using?

oh and perhaps Be86 is a little dusty, idk, i don't worry about it. I wipe down my glocks about every 200rds anyway, so its never really a problem.

 

[LiveLife]

BE86 ... Is this a very dirty powder?

I do not believe so as for me, it burned comparable or cleaner than other powders I have used.

As to your load development with 124 gr FMJ, from the BE-86 mega thread, many started getting reliable slide cycling and accuracy even at lower charges of 4.6 - 4.8 gr using shorter OAL.

I got good accuracy with 5.2 gr at 1.160" OAL and haven't done an incremental OAL reduction test yet to see if accuracy improved (as this load was plenty accurate). My guess is accuracy would improve as I went shorter to published 1.120" OAL.

Based on what I have read so far, if I was using shorter OAL like 1.100"-1.130", I would reduce my start charge to 4.6-4.8 and test 5.0, 5.2 and 5.4 gr.

If I was using longer OAL like 1.135"-1.145", I would start at 5.0 and test 5.2, 5.4 and 5.6 gr.

 

[egd]

Quite some time back I worked up a load of BE86 at 4.9 at 1.130 with RMR 124 gr.

 

[Axis II]

I have done a workup with this exact combo and I ended up settling at 5g overall. I liked the way it felt. now I was working up with a lone wolf 9mm glock conversion barrel that plunked at 1.06" so substantially shorter than what you have. I worked all the way up to 5.7g without any issues. 5.7 was snappy but I don't have a way to chrono my 9mm loads yet so i don't have any velocity data, just based my observation off of the recoil and the ejection, 5.7g threw the brass about 10ft away to my 4 o'clock, pretty aggressive a glock in my experience. If you get any velocity numbers i'd be interested to hear what you get

what sort of gun are you using?

oh and perhaps Be86 is a little dusty, idk, i don't worry about it. I wipe down my glocks about every 200rds anyway, so its never really a problem.

M&P full size

 

[Axis II]

I do not believe so as for me, it burned comparable or cleaner than other powders I have used.

As to your load development with 124 gr FMJ, from the BE-86 mega thread, many started getting reliable slide cycling and accuracy even at lower charges of 4.6 - 4.8 gr using shorter OAL.

I got good accuracy with 5.2 gr at 1.160" OAL and haven't done an incremental OAL reduction test yet to see if accuracy improved (as this load was plenty accurate). My guess is accuracy would improve as I went shorter to published 1.120" OAL.

Based on what I have read so far, if I was using shorter OAL like 1.100"-1.120", I would reduce my start charge to 4.6-4.8 and test 5.0, 5.2 and 5.4 gr.

If I was using longer OAL like 1.135"-1.145", I would start at 5.0 and test 5.2, 5.4 and 5.6 gr.

I thought about using lead or plated data as a start but getting ready to start shooting matches I was worried it wouldn't make power factor. I was also a little worried about reducing it and having issues like say reducing h110 seeing how Alliant didn't have a heck of a lot of info I figured stick to the FMJ data. I sear extreme 124 to 1.130 ish so figured be86 higher charge use the 1.150 oal

 

[ray15]

I think that 5.8gr. max is a little much for this bullet. I don't think you need to go down to lead data but back off a few tenths as the RMR bullets are sized a bit larger at .3555" and are going to make more pressure across the board. As bds mentioned 5.6gr. is a more realistic max for this projectile.

 

[bullseye308]

I did the same and started with 4.5-5.7 @ 1.12” oal. I settled on 5.2 for my Range Officers and 5.0 for my Glock 17’s. 5.6 and up seemed hot to me and didn’t shoot well anyway.

 

[Axis II]

I think that 5.8gr. max is a little much for this bullet. I don't think you need to go down to lead data but back off a few tenths as the RMR bullets are sized a bit larger at .3555" and are going to make more pressure across the board. As bds mentioned 5.6gr. is a more realistic max for this projectile.

Good to know, thanks! I only loaded 5 of each and will shoot them off a front rest tonight and see how they group. If they are a little too hot ill drop down to 5.0 and see what happens.

 

[Walkalong]

I do not believe so as for me, it burned comparable or cleaner than other powders I have used.

Same here, and the "dust" is likely just graphite you are seeing.

 

[Dudedog]

If anything I think Alliant's data runs on the hot side for BE86. I had two different lots and one lot was close to .2 of a grain hotter than the other (more than .1gr less than .2gr)
If it was me I would start around 4.7gr with a 124 (edit around).5gr less than Alliants MAX - 10%
Different bullets and different lots of BE86 but...
5" 9mm 1911, mixed range brass S+B SP
Charges as thrown after setting measure.


String: 6
Date: 7/23/2016
Time: 9:34:47 AM
Grains: 124
Hi Vel: 1116
Low Vel: 1057
Ave Vel: 1092
Ext Spread: 1073
Std Dev: 23
RMR 124 Plated FN 4.7 BE86 1.09 OAL
Velocity Power Factor Ft/Lbs
1090 135.16 327.097
1116 138.384 342.888
1089 135.036 326.497
1110 137.64 339.21
1057 131.068 307.591


String: 3
Date: 3/31/2017
Time: 3:14:34 PM
Grains: 124
Hi Vel: 1070
Low Vel: 1045
Ave Vel: 1054
Ext Spread: 25
Std Dev: 10
RMR Plated RN 124 1.12 OAL BE86 4.9
Velocity Power Factor Ft/Lbs
1070 132.68 315.203
1051 130.324 304.109
1048 129.952 302.375
1059 131.316 308.756
1045 129.58 300.646

String: 4
Date: 3/31/2017
Time: 3:15:43 PM
Grains: 124
Hi Vel: 1112
Low Vel: 1080
Ave Vel: 1093
Ext Spread: 32
Std Dev: 12
RMR Plated RN 124 1.12 OAL BE86 5.1
Velocity Power Factor Ft/Lbs
1112 137.888 340.434
1099 136.276 332.521
1089 135.036 326.497
1088 134.912 325.898
1080 133.92 321.123


String: 6
Date: 3/31/2017
Time: 3:18:05 PM
Grains: 124
Hi Vel: 1180
Low Vel: 1143
Ave Vel: 1158
Ext Spread: 37
Std Dev: 14
RMR Plated RN 124 1.12 OAL BE86 5.5
Velocity Power Factor Ft/Lbs
1180 146.32 383.343
1163 144.212 372.377
1160 143.84 370.458
1143 141.732 359.68
1146 142.104 361.57

 

[azjohn]

Attn: The highroad nor its members are responsible for data listed on the internet. Data above may or may not be suitable for your application use at your own risk. All data was recovered from www.alliantreloading.com.

Don't want to be trouble maker but shouldn't this be (not responsible)

 

[Walkalong]

From the sticky at the top of the page:

CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.

 

[Axis II]

Don't want to be trouble maker but shouldn't this be (not responsible)

Dang phone!! I have fat fingers and it does whatever it feels like sometimes.

 

[rbernie]

Is this a very dirty powder?

It's pretty smoky in use - moreso than, say, the Green Dot that I had been using as my standard go-to pistol powder. Having said that - I don't notice any more soot on the gun after use than before.....

 

[ray15]

It's pretty smoky in use - moreso than, say, the Green Dot that I had been using as my standard go-to pistol powder. Having said that - I don't notice any more soot on the gun after use than before.....

I can't say I really noticed much in the way of smoke, but I shoot outdoors. Soot in my max loads is average for powders in this speed range - not real dirty, not real clean. As you move away from max charges it gets pretty dirty and consistency suffers, just like CFE Pistol.

Here's a chrono result from the RMR 124MPR hollowpoint. I don't have any of their 124RN but assuming you match the seating depth (not OAL) the results should be valid. I seat these deep at 1.03" OAL to clear barrels with no leade. At the OALs you are using with the RN I would expect 5.6gr. to achieve approximately the same pressure/velocity.

9mm Luger
CZ P10c
RMR 124gr. MRP HP
5.5gr. BE86
CCI SPP
WIN brass
OAL: 1.03"
Moderate taper crimp
# FPS
10 1165
9 1162
8 1150
7 1150
6 1148
5 1158
4 1150
3 1149
2 1161
1 1146
Average: 1153.9 FPS
SD: 6.9 FPS
Min: 1146 FPS
Max: 1165 FPS
Spread: 19 FPS

Extrapolating from Jake's (RMR owner) comments posted here https://www.thehighroad.org/index.p...24-gr-rmr-mp-hp-for-xd9.826129/#post-10640747 this should be a reasonable non +P max load. Note the consistency - BE86 likes to be at 35,000psi and up. The standard deviations for lighter loads are less impressive. These results were obtained using sorted brass and thrown charges verified on a decent scale. This is an accurate load with sufficient velocity to expand readily in gel testing.

 

[Axis II]

I do not believe so as for me, it burned comparable or cleaner than other powders I have used.

As to your load development with 124 gr FMJ, from the BE-86 mega thread, many started getting reliable slide cycling and accuracy even at lower charges of 4.6 - 4.8 gr using shorter OAL.

I got good accuracy with 5.2 gr at 1.160" OAL and haven't done an incremental OAL reduction test yet to see if accuracy improved (as this load was plenty accurate). My guess is accuracy would improve as I went shorter to published 1.120" OAL.

Based on what I have read so far, if I was using shorter OAL like 1.100"-1.130", I would reduce my start charge to 4.6-4.8 and test 5.0, 5.2 and 5.4 gr.

If I was using longer OAL like 1.135"-1.145", I would start at 5.0 and test 5.2, 5.4 and 5.6 gr.

Well i have it a shot at 5.2gr of BE86 the other night and got the exact grouping with 10 shots you have listed freehand from 20ft. I am very happy with how it turned out and think ive got my load.

 

[JO JO]

I just loaded some last week first time with be86 , loaded 4.8,5.0,5.2,5.4
Like the 5.0 best
124 gr rn , g17 and vp9 no issues and all cycled fine

 

[Dudedog]

Cool ohihunter,
Glad you found one that works well for you.
I have been happy with all of the 9mm bullets from RMR.
Currently using the 125gr MPR HPs.
Only a little more than the RNs with the special discount code and can do double duty for Zombies.