45/70 QL request with Ramshot Exterminator

[michsteve]

here are the stats
Ramshot Exterminator
45/70
Starline Brass
300 grain Nosler ballistic silver tips
OAL 2.55


I have multiple rifles but mainly this is for a Ruger 1 in 22 inch barrel.

This is for my new jug of Ramshot Exterminator, I do have Reloader 7 and IMR 4198 which have recipes for, but the Ramshot shows nothing for the Nosler bullets but show for both Sierra and Hornady 300 grainers so I know the nosler BT should work.

 

[DrMike]

Cartridge          : .45-70 Govt. SAAMI
Bullet             : .458, 300, Nosler BallSilver RN 51834
Useable Case Capaci: 59.586 grain H2O = 3.869 cm³
Cartridge O.A.L. L6: 2.550 inch = 64.77 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Ramshot X-Terminator *C

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   82    48.24   1696    1915   20665   2944     69.6    1.638
-09.0   83    48.78   1715    1958   21236   2994     70.2    1.619
-08.0   84    49.31   1734    2002   21822   3045     70.8    1.600
-07.0   85    49.85   1753    2046   22428   3095     71.4    1.582
-06.0   86    50.38   1772    2091   23052   3146     72.0    1.564
-05.0   87    50.92   1791    2137   23694   3197     72.6    1.545
-04.0   88    51.46   1810    2183   24354   3247     73.2    1.528  ! Near Maximum !
-03.0   89    51.99   1830    2230   25041   3298     73.8    1.510  ! Near Maximum !
-02.0   90    52.53   1849    2277   25746   3348     74.4    1.492  ! Near Maximum !
-01.0   91    53.06   1868    2325   26471   3398     75.0    1.475  ! Near Maximum !
+00.0   91    53.60   1888    2374   27221   3449     75.6    1.458  ! Near Maximum !
+01.0   92    54.14   1908    2424   27996   3499     76.2    1.441  !DANGEROUS LOAD-DO NOT USE!
+02.0   93    54.67   1927    2474   28795   3549     76.8    1.424  !DANGEROUS LOAD-DO NOT USE!
+03.0   94    55.21   1947    2525   29619   3599     77.3    1.408  !DANGEROUS LOAD-DO NOT USE!
+04.0   95    55.74   1967    2577   30453   3648     77.9    1.391  !DANGEROUS LOAD-DO NOT USE!
+05.0   96    56.28   1987    2629   31348   3697     78.5    1.375  !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     91    53.60   2022    2723   32421   3765     84.0    1.356  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     91    53.60   1739    2015   22641   3046     65.8    1.579

 

[bdbrown66]

Dr. Mike, can you give me some info on how to interpret and use that data? I'm curious.

Thank you,
Brian

 

[michsteve]

Thanks now I have a base to start from.

 

[mjcmichigan]

Dr. Mike, can you give me some info on how to interpret and use that data? I'm curious.

Thank you,
Brian

That’s what it looks like on my PC.

Case file % is second column
Charge is 3rd
Expected velocity is 4th.


Sent from my iPhone using Tapatalk

 

[mjcmichigan]

BDBrown66, I sent it to you. Check your Gmail.


Sent from my iPhone using Tapatalk

 

[bdbrown66]

Mark,

Got it, thanks.

Brian