RL26 and 6.5 Creedmoor

[Nomosendero]

I have alot of both powders, I maybe should take the time to compare, again talking about the light bullets.
I think 26 is the best with 140 gr. & up.

Looks like bowfishins email from Berger would contradict that RL26 being to slow.

 

[JAYgs8163]

I have alot of both powders, I maybe should take the time to compare, again talking about the light bullets.
I think 26 is the best with 140 gr. & up.

From Berger tech support

 

[Nomosendero]

Thanks for that info, the range where 26 shines continues to amaze me.

 

[WWP2012]

Thanks to everyone for posting this. I had a 7lbs of RL26 on the bench collecting dust. I was ready to send the Creedmoor down the road in favor of a PRC to get a little more speed to the 140g accubonds.

I loaded up a ladder to check some velocities tomorrow, maybe this Creedmoor will get to keep its place in the safe.

 

[WWP2012]

Well, ran a 9 shot velocity ladder and the results were impressive.
24" Wilson barrel, 140g Accubond, Fed 210, Nosler brass, 2.730 COAL

47g 2861
47.25g 2873
47.5g 2895
48g 2943
48.25g 2953
48.5g 2972
48.75g 2970
49g 2988

I quit there for today as the primer had a scuff on it. But no ejector marks, brass looked good and it had a big node.

Can someone see what pressure shows in quickload?

 

[Bowfishn]

Well, ran a 9 shot velocity ladder and the results were impressive.
24" Wilson barrel, 140g Accubond, Fed 210, Nosler brass, 2.730 COAL

47g 2861
47.25g 2873
47.5g 2895
48g 2943
48.25g 2973
48.5g 2972
48.75g 2970
49g 2988

I quit there for today as the primer had a scuff on it. But no ejector marks, brass looked good and it had a big node.

Can someone see what pressure shows in quickload?

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 45.150 grain H2O = 2.932 cm³
Cartridge O.A.L. L6: 2.730 inch = 69.34 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.417% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-04.2 103 46.00 2798 2433 51052 10625 99.8 1.274
-03.8 103 46.20 2811 2457 51889 10646 99.9 1.265
-03.3 104 46.40 2825 2481 52740 10664 99.9 1.256
-02.9 104 46.60 2839 2505 53608 10682 99.9 1.246
-02.5 105 46.80 2852 2529 54494 10698 100.0 1.237 ! Near Maximum !
-02.1 105 47.00 2866 2553 55396 10712 100.0 1.228 ! Near Maximum !
-01.7 105 47.20 2879 2577 56317 10725 100.0 1.219 ! Near Maximum !
-01.3 106 47.40 2893 2601 57256 10737 100.0 1.210 ! Near Maximum !
-00.8 106 47.60 2906 2626 58214 10747 100.0 1.201 ! Near Maximum !
-00.4 107 47.80 2920 2650 59186 10757 100.0 1.192 ! Near Maximum !
+00.0 107 48.00 2933 2675 60188 10768 100.0 1.184 ! Near Maximum !
+00.4 108 48.20 2947 2699 61205 10777 100.0 1.175 ! Near Maximum !
+00.8 108 48.40 2960 2724 62243 10787 100.0 1.166 ! Near Maximum !
+01.3 109 48.60 2973 2748 63303 10797 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
+01.7 109 48.80 2987 2773 64384 10806 100.0 1.149 !DANGEROUS LOAD-DO NOT USE!
+02.1 109 49.00 3000 2798 65489 10815 100.0 1.141 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 107 48.00 3071 2931 76775 10211 100.0 1.082 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 48.00 2719 2298 46960 11012 96.6 1.319

 

[WWP2012]

@Bowfishn

Thank you

 

[WWP2012]

Final load with 140 Accubonds was 48g, 210m, Nosler brass, 24" 1-8 twist, .035 off lands = avg 2907 FPS, SD 7, ES 15 with the brake installed.

It shoots a .4 MOA. Would of never expected such great results when I bought that jug a year ago.

@Bowfishn could you please run Quickload for the 127 LRX with the above parameters. I am also curious what impact Magnum primers have over standard large rifle. I've searched a lot on here and don't see where someone tested the differences on these loads.

 

[Bowfishn]

Final load with 140 Accubonds was 48g, 210m, Nosler brass, 24" 1-8 twist, .035 off lands = avg 2907 FPS, SD 7, ES 15 with the brake installed.

It shoots a .4 MOA. Would of never expected such great results when I bought that jug a year ago.

@Bowfishn could you please run Quickload for the 127 LRX with the above parameters. I am also curious what impact Magnum primers have over standard large rifle. I've searched a lot on here and don't see where someone tested the differences on these loads.

I believe you will run into a problem with case fill before you get to max load.
Magnum primers increase pressure about the same as 1/2 grain of powder from the testing I had done with RL26 in the 6.5 CM.

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 127, Barnes 'LRX'BT 26403
Useable Case Capaci: 44.660 grain H2O = 2.900 cm³
Cartridge O.A.L. L6: 2.730 inch = 69.34 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.417% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-04.2 104 46.00 2866 2316 48861 10499 98.8 1.248
-03.8 104 46.20 2880 2340 49646 10529 98.9 1.239
-03.3 105 46.40 2895 2363 50446 10559 99.1 1.230
-02.9 105 46.60 2909 2387 51261 10587 99.2 1.221
-02.5 106 46.80 2924 2411 52089 10614 99.3 1.212
-02.1 106 47.00 2939 2435 52942 10639 99.4 1.203
-01.7 107 47.20 2953 2459 53807 10663 99.5 1.194 ! Near Maximum !
-01.3 107 47.40 2968 2483 54689 10685 99.6 1.185 ! Near Maximum !
-00.8 108 47.60 2982 2508 55590 10706 99.6 1.176 ! Near Maximum !
-00.4 108 47.80 2997 2532 56509 10726 99.7 1.168 ! Near Maximum !
+00.0 108 48.00 3011 2557 57448 10744 99.8 1.159 ! Near Maximum !
+00.4 109 48.20 3026 2582 58385 10761 99.8 1.150 ! Near Maximum !
+00.8 109 48.40 3040 2606 59381 10776 99.9 1.142 ! Near Maximum !
+01.3 110 48.60 3055 2631 60379 10789 99.9 1.133 ! Near Maximum !
+01.7 110 48.80 3069 2656 61398 10802 100.0 1.125 ! Near Maximum !
+02.1 111 49.00 3084 2681 62438 10812 100.0 1.117 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 108 48.00 3172 2838 72571 10171 100.0 1.057 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 108 48.00 2770 2164 45315 10631 93.9 1.292

 

[Jakeweb09]

I don't get how you guys are getting so much powder in the case. With a drop tube and 46 grains I'm crunching powder. 50 would be at the top of the neck.

 

[Tidus56]

I don't get how you guys are getting so much powder in the case. With a drop tube and 46 grains I'm crunching powder. 50 would be at the top of the neck.

Are you using Hornady brass? That will make a difference, it seems to have more case capacity. I also know some have used vibration to help the powder settle. Also what is your COAl? If you're at book COAL you'll have issues with all that powder.

 

[highdrum]

I don't get how you guys are getting so much powder in the case. With a drop tube and 46 grains I'm crunching powder. 50 would be at the top of the neck.

In Hornady brass I can fit 50.1gr w/ my 16" drop tube. In lapua 6.5cr lrp I can get 48gr in there max. This is with a 140 Berger @ 2.92" long to lands. No crunch, the bearing surface is 1/3 up the neck. I do not use 143/147 Hornady bullets as the bearing surface is too long, causes things to be super compressed or reduced charges.

 

[Buzzsaw]

WOW, that's seems like a long throat 2.92"

I'm seating the 140gr ELDM to 2.82" which is just off the lands, I don't recall to the lands #, I'd have to look.

 

[highdrum]

WOW, that's seems like a long throat 2.92"

I'm seating the 140gr ELDM to 2.82" which is just off the lands, I don't recall to the lands #, I'd have to look.

It's a Tikka, which are normally long throated for some reason(probably to keep psi down, insurance purposes). Im figuring freebore to be around 210-220 on it, but it works well with the 2.97" magazines the rifle comes with. I was able to run my nephews 20" Tikka creed to almost 2900 w/ rl26 and 143 eldx(50.1gr) however I settled on a spot down around 2800, which is still smoking fast for a 20" creedmoor.