Anyone got 300 WM R26 loads/experience

[FOTIS]

Just got 8 lbs more

 

[Keith1369]

I have been lurking around here for several years and finally joined the group.

I have a 300 that has a 26 inch long throated Douglas barrel and when a 180 Partition is seated with an OAL of 3.6 inches the bullet's base is at the juncture of the shoulder/neck. This barrel was installed back in the mid 1980s shortly after IMR 7828 was released and that was the rifles go to powder. Due to the long throat the max powder charge was 80 grains and produced a speed of 3152 FPS. It was an excellent load until my supply of the 1980s powder ran out and the recent powder is much hotter so the load was reduced 2 grains to 78 now days.

Any way last summer I started trying RL26 and the Partition bullet and got up to an un-clocked 76 grains and then reality hit me. Here I was burning up my small supply of powder trying to replace an already excellent load. For me 26 is mostly used for 150 Partitions and 270s and 30/06 pushing 180 Accubonds.

Sorry for the long first post. Semper Fi

 

[SJB358]

I have been lurking around here for several years and finally joined the group.

I have a 300 that has a 26 inch long throated Douglas barrel and when a 180 Partition is seated with an OAL of 3.6 inches the bullet's base is at the juncture of the shoulder/neck. This barrel was installed back in the mid 1980s shortly after IMR 7828 was released and that was the rifles go to powder. Due to the long throat the max powder charge was 80 grains and produced a speed of 3152 FPS. It was an excellent load until my supply of the 1980s powder ran out and the recent powder is much hotter so the load was reduced 2 grains to 78 now days.

Any way last summer I started trying RL26 and the Partition bullet and got up to an un-clocked 76 grains and then reality hit me. Here I was burning up my small supply of powder trying to replace an already excellent load. For me 26 is mostly used for 150 Partitions and 270s and 30/06 pushing 180 Accubonds.

Sorry for the long first post. Semper Fi

Welcome aboard Keith.. Semper Fi

 

[FOTIS]

Cartridge          : .300 Weath. Mag.
Bullet             : .308, 180, Nosler PART SP 16331
Useable Case Capaci: 89.019 grain H2O = 5.780 cm³
Cartridge O.A.L. L6: 3.560 inch = 90.42 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0   77    68.00   2585    2671   31010  11046     97.2    1.648
-18.0   79    69.70   2652    2812   33287  11323     98.2    1.606
-16.0   81    71.40   2719    2956   35754  11570     98.9    1.565
-14.0   83    73.10   2786    3102   38411  11788     99.4    1.517
-12.0   85    74.80   2852    3251   41284  11974     99.8    1.467
-10.0   87    76.50   2918    3402   44392  12126    100.0    1.418
-08.0   89    78.20   2982    3555   47738  12247    100.0    1.372
-06.0   91    79.90   3046    3709   51306  12361    100.0    1.328
-04.0   92    81.60   3109    3864   55132  12471    100.0    1.285
-02.0   94    83.30   3172    4020   59239  12577    100.0    1.244  ! Near Maximum !
+00.0   96    85.00   3233    4178   63653  12678    100.0    1.205  ! Near Maximum !
+02.0   98    86.70   3295    4338   68400  12776    100.0    1.167  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    88.40   3355    4500   73510  12868    100.0    1.131  !DANGEROUS LOAD-DO NOT USE!
+06.0  102    90.10   3416    4664   79017  12956    100.0    1.096  !DANGEROUS LOAD-DO NOT USE!
+08.0  104    91.80   3476    4829   84961  13039    100.0    1.062  !DANGEROUS LOAD-DO NOT USE!
+10.0  106    93.50   3536    4998   91386  13117    100.0    1.030  !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     96    85.00   3356    4501   78953  12206    100.0    1.106  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     96    85.00   3043    3702   48965  13283     99.5    1.341

 

[Joec7651]

The only thing I use RL26 for is my 270 Win E-Tip loads. I get 3128 fps easily with RL-26.

 

[lhsako]

For those interested, shot my 75.5 gr load today with R22 and Sierra 180 GK. Temp 38 and 2925 fps.... usually does 3000-3050 in warmer temps.

Shot 77 grs of R26 and did 3035 fps and 78 grs did 3125 fps. Could cover the 3 shot group of 78 grs R26 with a dime. Others grouped 3/4" +/- ... that's the norm. Just not sure how the load might work with 70+ degree days but worth trying.

Bolt opened easy, no extractor marks or abnormal Primer flow.

I’d bet you’re fine. It’s not nearly as bad as some folks preach. That’s great speed.

Speed kills....

 

[brikwhitt]

R26 in my 280 Ack Imp is excellent. I stayed at 60.5gns at 3013 fps because accuracy is outstanding. I've been as high as 63 grns for 3100ish cant quiet remember, but accuracy although it was good wasn't as good as 60.5.

It's not as plentiful here as I wish it was, but I do have 4 pounds of it. I have some 7828 to work up a load with, but haven't tried it yet.