338 250PT R23 QL

[preacher]

Can someone crunch these numbers for a 24" bbl and 63K? Thanks. I want to see how it compares to R22...

 

[DrMike]

Cartridge          : .338 Win Mag.
Bullet             : .338, 250, Nosler PART SP 35644
Useable Case Capaci: 73.847 grain H2O = 4.795 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-23

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0  100    66.78   2474    3399   43334   9371     99.9    1.417
-09.0  101    67.52   2502    3474   44896   9426    100.0    1.395
-08.0  103    68.26   2529    3550   46522   9474    100.0    1.372
-07.0  104    69.01   2556    3626   48213   9518    100.0    1.350
-06.0  105    69.75   2583    3702   49972   9562    100.0    1.329
-05.0  106    70.49   2609    3779   51801   9604    100.0    1.308
-04.0  107    71.23   2636    3857   53709   9645    100.0    1.287  ! Near Maximum !
-03.0  108    71.97   2662    3935   55694   9686    100.0    1.267  ! Near Maximum !
-02.0  109    72.72   2689    4013   57764   9725    100.0    1.247  ! Near Maximum !
-01.0  110    73.46   2715    4092   59921   9764    100.0    1.227  ! Near Maximum !
+00.0  111    74.20   2741    4171   62172   9802    100.0    1.208  ! Near Maximum !
+01.0  113    74.94   2767    4251   64518   9838    100.0    1.189  !DANGEROUS LOAD-DO NOT USE!
+02.0  114    75.68   2793    4332   66969   9874    100.0    1.170  !DANGEROUS LOAD-DO NOT USE!
+03.0  115    76.43   2820    4413   69523   9909    100.0    1.152  !DANGEROUS LOAD-DO NOT USE!
+04.0  116    77.17   2845    4495   72202   9943    100.0    1.134  !DANGEROUS LOAD-DO NOT USE!
+05.0  117    77.91   2871    4577   74988   9975    100.0    1.116  !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    111    74.20   2839    4473   77231   9406    100.0    1.117  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    111    74.20   2590    3723   49029  10276     99.3    1.329

Cartridge          : .338 Win Mag.
Bullet             : .338, 250, Nosler PART SP 35644
Useable Case Capaci: 73.847 grain H2O = 4.795 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-22

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   98    67.23   2473    3394   43572   9929     95.7    1.414
-09.0   99    67.98   2502    3474   45123  10042     96.2    1.391
-08.0  100    68.72   2531    3556   46736  10151     96.6    1.368
-07.0  101    69.47   2560    3638   48412  10256     97.0    1.346
-06.0  102    70.22   2589    3722   50155  10356     97.4    1.324
-05.0  103    70.97   2619    3806   51969  10453     97.8    1.303
-04.0  104    71.71   2648    3892   53849  10544     98.1    1.283  ! Near Maximum !
-03.0  105    72.46   2677    3978   55819  10631     98.4    1.262  ! Near Maximum !
-02.0  106    73.21   2706    4065   57865  10713     98.7    1.242  ! Near Maximum !
-01.0  107    73.95   2735    4153   59995  10790     98.9    1.222  ! Near Maximum !
+00.0  109    74.70   2764    4242   62214  10862     99.2    1.203  ! Near Maximum !
+01.0  110    75.45   2793    4332   64528  10929     99.4    1.184  !DANGEROUS LOAD-DO NOT USE!
+02.0  111    76.19   2823    4422   66944  10989     99.5    1.165  !DANGEROUS LOAD-DO NOT USE!
+03.0  112    76.94   2852    4514   69463  11045     99.7    1.147  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    77.69   2881    4606   72091  11095     99.8    1.128  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    78.44   2909    4699   74823  11138     99.9    1.110  !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    109    74.70   2893    4645   76335  10457    100.0    1.110  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    109    74.70   2583    3703   49630  10664     93.6    1.324

 

[truck driver]

I would likely go with R23 since there is only 20fps difference and 1000psi less with max loads. JMO

 

[SJB358]

What does 26 look like with the same profile?

I ran 26 with 225 and 250 Partitions and man it was fast. Didn’t seem to be anymore compression that 22 either.

 

[DrMike]

What does 26 look like with the same profile?

I ran 26 with 225 and 250 Partitions and man it was fast. Didn’t seem to be anymore compression that 22 either.

Cartridge          : .338 Win Mag.
Bullet             : .338, 250, Nosler PART SP 35644
Useable Case Capaci: 73.847 grain H2O = 4.795 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 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 1.0% 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

-10.0   95    69.75   2521    3527   42294  10444     99.2    1.425
-09.0   96    70.53   2552    3614   43902  10523     99.4    1.400
-08.0   97    71.30   2582    3702   45583  10595     99.6    1.376
-07.0   98    72.08   2613    3790   47337  10658     99.8    1.352
-06.0  100    72.85   2644    3880   49169  10714     99.9    1.329
-05.0  101    73.63   2674    3970   51085  10762    100.0    1.306
-04.0  102    74.40   2704    4060   53087  10802    100.0    1.283
-03.0  103    75.18   2735    4152   55182  10836    100.0    1.261  ! Near Maximum !
-02.0  104    75.95   2765    4243   57375  10869    100.0    1.239  ! Near Maximum !
-01.0  105    76.73   2795    4336   59670  10902    100.0    1.218  ! Near Maximum !
+00.0  106    77.50   2825    4429   62076  10933    100.0    1.197  ! Near Maximum !
+01.0  107    78.28   2855    4523   64599  10962    100.0    1.176  !DANGEROUS LOAD-DO NOT USE!
+02.0  108    79.05   2884    4618   67244  10991    100.0    1.156  !DANGEROUS LOAD-DO NOT USE!
+03.0  109    79.83   2914    4713   70022  11018    100.0    1.136  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    80.60   2943    4809   72939  11043    100.0    1.117  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    81.38   2973    4907   76005  11067    100.0    1.097  !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    106    77.50   2947    4820   79162  10405    100.0    1.096  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106    77.50   2633    3848   48202  11354     97.9    1.332

 

[truck driver]

Not to get off topic here but Scotty is R26 the do all powder for magnum size cases? It appears to produce higher velocities in everything it is used in or am I misinterpreting what I read?

 

[SJB358]

Mike, that data is just about what I saw. Wasn’t super compressed but man it was fast.

TD, I’ve been using a lot of it the past couple of years. It has worked really well in the 243, 6.5 Swede, 25-06, 270 WSM. 7 WSM, and some others I’m probably forgetting. I guess if I had to stick it in a group it runs like H4831sc or R22 but attains more speed. It’s pretty versatile since it fits in some smaller cases and can still get full pressure. I wouldn’t be surprised if it worked in the 22-250 with heavy bullets.

 

[preacher]

I've always had terrific speeds before pressure signs, but not always accuracy. This is only in a couple standard cases and the 7mm mag.

 

[preacher]

Sorry, meant to say "I've always had terrific speeds with R26 before pressure signs, but not always accuracy. This is only in a couple standard cases and the 7mm mag".

 

[DrMike]

Jim,

I believe we're up to an entire concert. :? Let's agree that you'll perform before my funeral. I'll just wait. :mrgreen: Wouldn't want to spoil the concert.

 

[JD338]

Wow, 2850 fps for a 250 gr out of the 338 WM is impressive.
Can't imagine anything going far with a solid hit.

JD338

 

[preacher]

Gosh yeah, I'm thinking 2700 is pretty awesome with a 250 anything! ha

 

[preacher]

Doc, if you can put me on a moose, I'm pretty sure I could swing a "concert trip" up your way! ha Just teasing, I do appreciate the number crunching though!

 

[truck driver]

Mike, that data is just about what I saw. Wasn’t super compressed but man it was fast.

TD, I’ve been using a lot of it the past couple of years. It has worked really well in the 243, 6.5 Swede, 25-06, 270 WSM. 7 WSM, and some others I’m probably forgetting. I guess if I had to stick it in a group it runs like H4831sc or R22 but attains more speed. It’s pretty versatile since it fits in some smaller cases and can still get full pressure. I wouldn’t be surprised if it worked in the 22-250 with heavy bullets.

Thanks Scotty, I've noticed the bigger rounds like to have the pressure up. But I'm wondering how the accuracy is with R26 as compared to the other powders I've used?
Sometimes speed isn't everything but consistent accuracy will go a long way to make up the difference.

 

[preacher]

I'm certainly going to try out R26 with the 250s in this .338 when I start! I read of good stability in colder temps, which is great for my use. I am planning on starting out with R15/200 NBT around 2850fps or so. That is also a good powder for me here. It worked super swell in some cols weather tests I did in my 35 WAI/310rn.