7mm Rem Mag Quickload Request

Joec7651

Handloader
Apr 7, 2019
924
1,224
Good afternoon. Could one of you run a Quickload for me if you have time?

7mm Remington Magnum
Ramshot LRT
180gr Berger Hybrid Target
OAL 3.450”
26” barrel rifled 1:8
 
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Code:
Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger Hy Tgt G7 #28407
Useable Case Capaci: 70.939 grain H2O = 4.606 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Ramshot LRT

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   97    68.31   2600    2701   41423  11645     86.3    1.550
-09.0   98    69.07   2635    2774   42962  11834     87.1    1.522
-08.0   99    69.83   2670    2849   44567  12020     87.9    1.496
-07.0  100    70.59   2705    2925   46241  12203     88.7    1.470
-06.0  101    71.35   2741    3003   47986  12382     89.4    1.444
-05.0  102    72.11   2777    3082   49809  12557     90.1    1.419
-04.0  103    72.86   2813    3163   51713  12728     90.8    1.394
-03.0  104    73.62   2849    3245   53701  12894     91.5    1.369  ! Near Maximum !
-02.0  105    74.38   2886    3328   55780  13055     92.2    1.345  ! Near Maximum !
-01.0  107    75.14   2922    3413   57955  13211     92.8    1.321  ! Near Maximum !
+00.0  108    75.90   2959    3500   60230  13362     93.4    1.298  ! Near Maximum !
+01.0  109    76.66   2996    3587   62607  13507     94.0    1.275  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    77.42   3033    3677   65112  13646     94.6    1.253  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    78.18   3070    3768   67730  13778     95.1    1.230  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    78.94   3108    3860   70478  13904     95.7    1.208  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    79.70   3145    3954   73364  14023     96.2    1.187  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    108    75.90   3062    3746   66854  13594     96.7    1.240  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    108    75.90   2844    3233   54117  12932     89.1    1.364  ! Near Maximum !
 
Thanks Doc! That looks pretty promising.

These will be my first loads with LRT. I have a ladder loaded to shoot tomorrow. Pulling from Hodgdons site I loaded a few 3 round sets around what I figured would be upper middle loads, hoping to get lucky and have bug holes land in my lap. They are .015” off the lands at 3.450” so I have some freedom with seating depth. We‘ll see what the rifle, targets, and Magnetospeed tell me.

EDIT: If LRT doesn’t work out I’ll move on to Staball HD. 7828 and RL25 treat me well also.
 
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Keep us posted. I'm watching for your results. Interested in lrt and staball HD. 7828 is pretty good but might be a little fast for 180s. RL25....pass...lol
 
Keep us posted. I'm watching for your results. Interested in lrt and staball HD. 7828 is pretty good but might be a little fast for 180s. RL25....pass...lol
Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.
 
Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.
Can’t argue with those results.
 
Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.
I say that only because of availability but also not "temp stable" I don't think? I suppose the "availability" could be said about my go to H1000 though as well...
 
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