Another .300 Win.Mag. Quickload request......thank you !

[jagermeister]

I'd appreciate if Some of you Guys could run the Quickload data for the following :

300 Winchester Magnum
Hornady 200 ELD-X bullet
Norma MRP Powder
Norma Brass
Federal GM215 primer
C.O.A.L. : 3,464" (88,00 mm.)

26" 1-11" barrel twist rate
Approximate Temp. : 60°F
Approx. Elevation : 2000 Ft.

Thank you very much for your help.



P.S.: Does the QL software also give the difference in powder load between light brass (Norma, Rem, W-W) and heavy one (RWS) ?

 

[TackDriver284]

Data with different cases is determined by weighing your fired case ( unsized ) with a fired primer and filling it level to the mouth with water and weighed. The difference is entered in the water capacity database on QL and in turn will show how much % case fill you have with a certain type of brass. Different brass have variance in thickness which result in less or more powder volume.

Cartridge          : .300 Win. Mag.(SAAMI)
Bullet             : .308, 200, Hornady ELD-X 3076
Useable Case Capaci: 80.024 grain H2O = 5.196 cm³
Cartridge O.A.L. L6: 3.464 inch = 87.99 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Norma MRP ?, Temperature: 60 °F

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   88    67.50   2699    3234   42933  11079     98.8    1.495
-09.0   89    68.25   2728    3306   44418  11177     99.1    1.472
-08.0   90    69.00   2758    3379   45958  11269     99.3    1.449
-07.0   91    69.75   2788    3452   47555  11356     99.5    1.427
-06.0   92    70.50   2817    3525   49202  11437     99.7    1.404
-05.0   93    71.25   2847    3599   50899  11512     99.8    1.383
-04.0   94    72.00   2876    3674   52650  11581     99.9    1.362
-03.0   95    72.75   2905    3749   54459  11644    100.0    1.341  ! Near Maximum !
-02.0   95    73.50   2935    3824   56331  11700    100.0    1.321  ! Near Maximum !
-01.0   96    74.25   2963    3900   58267  11751    100.0    1.301  ! Near Maximum !
+00.0   97    75.00   2992    3976   60271  11800    100.0    1.281  ! Near Maximum !
+01.0   98    75.75   3021    4053   62345  11849    100.0    1.262  ! Near Maximum !
+02.0   99    76.50   3049    4130   64493  11896    100.0    1.243  !DANGEROUS LOAD-DO NOT USE!
+03.0  100    77.25   3078    4207   66716  11943    100.0    1.225  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    78.00   3106    4285   69019  11989    100.0    1.206  !DANGEROUS LOAD-DO NOT USE!
+05.0  102    78.75   3134    4363   71405  12033    100.0    1.189  !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     97    75.00   3111    4299   73600  11334    100.0    1.183  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    75.00   2812    3512   47541  12027     97.5    1.414

 

[jagermeister]

Thanks TackDriver284 ! Appreciate your help.

Roughly, I know I'll have to reduce the powder charge by 6-7% while going from light brass (Norma) over to RWS.

I am still trying both, to find out which is better.

:wink:

 

[TackDriver284]

Thanks TackDriver284 ! Appreciate your help.

Roughly, I know I'll have to reduce the powder charge by 6-7% while going from light brass (Norma) over to RWS.

I am still trying both, to find out which is better.

:wink:

Give me your water capacity data for those cases and I'll run the numbers again for you. Good luck.

 

[jagermeister]

I've run a three 3-shot loads quick test the other day, with a different bullet (Sierra MK200) but based on the QLoad data from this 3D.

100 meter distance (roughly 110 yds.) from lower load (target #1) to the highest (#3).
I used "F" for the cold bore shot Load # 1.

Considering the kind of rifle used, I'd say they look quite promising and I am gonna run the exact same loads (including #1, because I suspect there was some "bullet contamination issue" that made the first 2 shots going slightly off...and then shots 3-4 were spot on...) with the Hornady ELD-X.



From this result, I'd go with load # 3, but I'll have to see what ELD's have to say.... :mrgreen:

 

[DrMike]

The accuracy potential is there; that's for sure.

 

[jagermeister]

Tried the Hornady ELD-X 200 the other day, with the same loads as the SMK 200.

Not really impressed, I must say..... :?



Load #1 (Norma MRP x 71 grs.) = too mild : Cases showed slight smoke...

Load #2 (Norma MRP x 72,4 grs.) = Big step up on recoil compared to #1, although quite "round" - No pressure signs on primers

Load #3 (Norma MRP x 73,7 grs.) = Still step up on recoil compared to #2, much "stiffer" - No pressure signs on primers

Hornady and Norma state 73.6-73.7 as max. load, although I suspect they've been quite conservative..... :mrgreen:

According to QLoad data (above), I am not near max load and I am tempted to try a batch with 75 grs., to check for pressure signs and to see whether group spreads or tightens.

I've already tried 77 grs. with 185 Berger VLD and it performed quite well with no pressure signs.

Your thoughts ?

Thanks