45/70 QL request with Ramshot Exterminator

michsteve

Beginner
Aug 20, 2020
105
88
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

Ballistician
Nov 8, 2006
35,167
1,713
Code:
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

Handloader
May 16, 2016
713
105
Dr. Mike, can you give me some info on how to interpret and use that data? I'm curious.

Thank you,
Brian
 

mjcmichigan

Handloader
Dec 26, 2016
2,264
25
bdbrown66":140beook said:
Dr. Mike, can you give me some info on how to interpret and use that data? I'm curious.

Thank you,
Brian
8b6612f8fc7fe7ecd1fddfc0ec8821b6.jpg


That’s what it looks like on my PC.

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


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