300 RUM QL Request

[Tjay]

Starting work up on two E-tip bullets 168 and 180 for my 300 RUM for next years elk hunt. Would like to try R-33 any help would be greatly appreciated.

Anyone with good already worked also welcomed.

 

[DrMike]

QL Projection w SAAMI parameters:

Cartridge          : .300 Rem Ultra Mag
Bullet             : .308, 168, Nosler E-Tip 59415
Useable Case Capaci: 100.518 grain H2O = 6.527 cm³
Cartridge O.A.L. L6: 3.598 inch = 91.39 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-33

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   83    83.68   2436    2213   29255  11583     83.6    1.668
-18.0   85    85.77   2509    2348   31545  12058     85.6    1.623
-16.0   87    87.86   2583    2489   34034  12520     87.6    1.579
-14.0   89    89.96   2658    2635   36748  12964     89.4    1.535
-12.0   92    92.05   2734    2788   39706  13388     91.2    1.478
-10.0   94    94.14   2810    2945   42936  13788     92.8    1.426
-08.0   96    96.23   2887    3108   46465  14160     94.2    1.374
-06.0   98    98.32   2964    3277   50329  14501     95.6    1.324
-04.0  100   100.42   3041    3450   54558  14808     96.7    1.276
-02.0  102   102.51   3118    3627   59139  15078     97.7    1.230  ! Near Maximum !
+00.0  104   104.60   3196    3809   64126  15308     98.5    1.185  ! Near Maximum !
+02.0  106   106.69   3273    3995   69568  15493     99.2    1.142  !DANGEROUS LOAD-DO NOT USE!
+04.0  108   108.78   3350    4185   75518  15633     99.6    1.101  !DANGEROUS LOAD-DO NOT USE!
+06.0  110   110.88   3426    4379   82035  15725     99.9    1.061  !DANGEROUS LOAD-DO NOT USE!
+08.0  112   112.97   3502    4575   89189  15765    100.0    1.022  !DANGEROUS LOAD-DO NOT USE!
+10.0  114   115.06   3577    4774   97063  15780    100.0    0.985  !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    104   104.60   3383    4270   80318  14887    100.0    1.076  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104   104.60   2936    3216   49278  14637     91.1    1.329

 

[Tjay]

Thanks DrMike.
That gives ma a good starting point.

 

[Charlie-NY]

Those velocities seem remarkably slow. I regularly shoot a 200gr bullet at about 3,200 ft/sec and I would expect a 168gr to be a few hundred ft/sec faster. However, I rarely shoot monometal bullets.