7mm remem mag 180 eldm H870 quick load request
- Thread starter Justramit
- Start date
DrMike
Ballistician
- Nov 8, 2006
- 37,311
- 5,973
Since H870 has been out of production for some time, and because the ELD series of bullets were introduced well after H870 was no longer produced, you won't find information. Fortunately, projections can still be generated with QL. Here you go.
Code:
Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 180, Hornady ELD-M 28503
Useable Case Capaci: 70.847 grain H2O = 4.600 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H870
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
-10.0 100 67.68 2643 2793 40750 12119 95.0 1.572
-09.0 101 68.43 2678 2867 42321 12269 95.6 1.544
-08.0 103 69.18 2713 2943 43960 12413 96.2 1.517
-07.0 104 69.94 2748 3019 45673 12550 96.7 1.490
-06.0 105 70.69 2784 3097 47465 12680 97.2 1.463
-05.0 106 71.44 2819 3176 49338 12803 97.6 1.437
-04.0 107 72.19 2854 3255 51299 12918 98.0 1.411
-03.0 108 72.94 2889 3336 53351 13025 98.4 1.386 ! Near Maximum !
-02.0 109 73.70 2924 3418 55501 13124 98.7 1.361 ! Near Maximum !
-01.0 110 74.45 2960 3501 57753 13215 99.0 1.336 ! Near Maximum !
+00.0 112 75.20 2995 3585 60117 13297 99.3 1.312 ! Near Maximum !
+01.0 113 75.95 3030 3669 62593 13369 99.5 1.289 !DANGEROUS LOAD-DO NOT USE!
+02.0 114 76.70 3065 3755 65200 13433 99.7 1.266 !DANGEROUS LOAD-DO NOT USE!
+03.0 115 77.46 3100 3842 67932 13487 99.8 1.243 !DANGEROUS LOAD-DO NOT USE!
+04.0 116 78.21 3135 3929 70797 13531 99.9 1.220 !DANGEROUS LOAD-DO NOT USE!
+05.0 117 78.96 3170 4017 73794 13565 100.0 1.198 !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 112 75.20 3159 3988 76284 12736 100.0 1.194 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 112 75.20 2759 3043 46468 12964 92.8 1.467DrMike
Ballistician
- Nov 8, 2006
- 37,311
- 5,973
Consequently, H870 was my "go to" propellant in my 7 RM when I was using 175 grain Partitions and 175 grain Grand Slams. I still have a few pounds hiding around here.
Guy Miner
Master Loader
- Apr 6, 2006
- 17,745
- 5,809
H870 was my choice for the 7mm Rem Mag and the 175 gr Nosler Partition I used to take a good bull elk in 2000. It worked well with Nosler & Sierra 175's.
I've probably still got my old load data filed away here if you'd like it. Only five grains of bullet weight off, but it looks like Dr. Mike has you covered.
A little sooty, but high velocity and fine accuracy. I haven't seen any in quite a few years.
By the way, welcome aboard the Nosler Forum. Nice place here. We'd like to see your results, once you load and test some of those 7mm Rem Mag loads.
Regards, Guy
I've probably still got my old load data filed away here if you'd like it. Only five grains of bullet weight off, but it looks like Dr. Mike has you covered.
A little sooty, but high velocity and fine accuracy. I haven't seen any in quite a few years.
By the way, welcome aboard the Nosler Forum. Nice place here. We'd like to see your results, once you load and test some of those 7mm Rem Mag loads.
Regards, Guy
nhenry
Handloader
- Feb 7, 2022
- 609
- 1,060
Welcome to the forum!
- Thread starter
- #6
- Oct 30, 2004
- 24,262
- 2,968
Welcome!
Same here. I loved the stuff actually. It was the first powder I used in my 7mm Rem Mag and it worked like a champ with 140-175 Noslers!
