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Joined: Sep 2014
Posts: 3,444
Campfire Tracker
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OP
Campfire Tracker
Joined: Sep 2014
Posts: 3,444 |
Anyone have any .243 loads using a Hornady 80 gr. GMX bullet? I have IMR 4064 and IMR 4350 powders. The rifle is a Remington 660 with a 1-9" twist. I load for my .308 and 30.06, but the .243 is new to me. Thanks for any help.
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Joined: Nov 2011
Posts: 1,730
Campfire Regular
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Campfire Regular
Joined: Nov 2011
Posts: 1,730 |
I'm working on loads for my 243 right now....I'll get back to you...
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Joined: Feb 2008
Posts: 5,735
Campfire Tracker
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Campfire Tracker
Joined: Feb 2008
Posts: 5,735 |
Work up from 36 grains of Varget.
I have not seen one that didn't shoot well between 37 and 38.5.
When using Barnes or other mono metal bullets, be ready to spend a lot of time solving seating depth.
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Joined: Jan 2007
Posts: 525
Campfire Regular
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Campfire Regular
Joined: Jan 2007
Posts: 525 |
Here's how QL calls both of those powders you have on hand with the 80g GMX Cartridge : .243 Win.
Bullet : .243, 80, Hornady GMX 24370
Useable Case Capaci: 49.201 grain H2O = 3.195 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : IMR 4064
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 71 30.40 2513 1122 36846 9323 93.6 1.124
-18.0 73 31.16 2567 1171 38587 9566 94.4 1.139
-16.0 74 31.92 2620 1220 40424 9803 95.2 1.117
-14.0 76 32.68 2674 1270 42362 10033 95.9 1.094
-12.0 78 33.44 2726 1320 44404 10255 96.6 1.073
-10.0 80 34.20 2779 1372 46556 10468 97.2 1.052
-08.0 82 34.96 2831 1423 48821 10671 97.8 1.032
-06.0 83 35.72 2883 1476 51206 10865 98.3 1.012 ! Near Maximum !
-04.0 85 36.48 2934 1529 53715 11047 98.8 0.993 ! Near Maximum !
-02.0 87 37.24 2985 1583 56356 11218 99.1 0.974 ! Near Maximum !
+00.0 89 38.00 3036 1637 59135 11377 99.4 0.955 ! Near Maximum ! Cartridge : .243 Win.
Bullet : .243, 80, Hornady GMX 24370
Useable Case Capaci: 49.201 grain H2O = 3.195 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : IMR 4350
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 74 33.60 2463 1078 35429 9183 86.3 1.165
-18.0 76 34.44 2517 1125 37195 9464 87.4 1.143
-16.0 78 35.28 2571 1174 39053 9743 88.4 1.121
-14.0 80 36.12 2625 1224 41003 10018 89.5 1.100
-12.0 82 36.96 2679 1275 43048 10289 90.5 1.079
-10.0 84 37.80 2734 1328 45195 10554 91.5 1.058
-08.0 86 38.64 2788 1381 47448 10814 92.4 1.038
-06.0 88 39.48 2843 1436 49813 11066 93.3 1.018
-04.0 89 40.32 2898 1492 52310 11311 94.2 0.998 ! Near Maximum !
-02.0 91 41.16 2953 1549 54961 11547 95.0 0.979 ! Near Maximum !
+00.0 93 42.00 3007 1607 57777 11774 95.7 0.960 ! Near Maximum !
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Joined: Nov 2013
Posts: 28,704
Campfire Ranger
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Campfire Ranger
Joined: Nov 2013
Posts: 28,704 |
The Hodgdon online data section has exactly what you're looking for.
What fresh Hell is this?
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