QuickLoad info for .243?

rick3 · Apr 3, 2015

I've developed a nice load for my .243 that matches one of the OBT for my barrel length. But it's a VERY mild load, and I'd like to get a bit more MV while still matching up for an OBT...could someone do a QuickLoad run on my info?

I've done some incremental testing of this combo, but the results I got didn't really show me any significant differences, so I'd like to get a better idea of what SHOULD be good.

Savage Axis, .243
22.125 measured barrel length
54.5 gr measured case capacity
Sierra Pro-Hunter, 100 gr spitzer
Cartridge OAL: 2.655"
Powder: IMR 4064 (not the best for this bullet, but it's what I have right now)
Charge (currently): 33.5gr (IMR recommendations of Min: 33.0/Max:36.5)

OBT for a 22" barrel:
0.6843, 0.7522, 0.8550, 0.9237, 1.0257, 1.0952, 1.1964

Thanks for any help!

DrMike · Apr 3, 2015

Cartridge : .243 Win.
Bullet : .243, 75, Sierra HP 1510
Useable Case Capaci: 52.108 grain H2O = 3.383 cm³
Cartridge O.A.L. L6: 2.655 inch = 67.44 mm
Barrel Length : 22.1 inch = 562.0 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 74 33.60 2692 1207 32515 8999 93.1 1.303
-18.0 76 34.44 2753 1262 34542 9247 94.1 1.275
-16.0 78 35.28 2813 1317 36681 9485 95.1 1.247
-14.0 80 36.12 2872 1374 38938 9712 96.0 1.213
-12.0 81 36.96 2932 1431 41319 9927 96.8 1.180
-10.0 83 37.80 2991 1489 43831 10130 97.5 1.148
-08.0 85 38.64 3049 1548 46480 10319 98.1 1.117
-06.0 87 39.48 3107 1607 49275 10495 98.7 1.087
-04.0 89 40.32 3164 1667 52222 10655 99.1 1.058 ! Near Maximum !
-02.0 91 41.16 3221 1728 55331 10800 99.5 1.031 ! Near Maximum !
+00.0 93 42.00 3277 1788 58612 10929 99.7 1.004 ! Near Maximum !
+02.0 94 42.84 3333 1850 62075 11041 99.9 0.979 !DANGEROUS LOAD-DO NOT USE!
+04.0 96 43.68 3387 1911 65731 11136 100.0 0.954 !DANGEROUS LOAD-DO NOT USE!
+06.0 98 44.52 3441 1972 69592 11216 100.0 0.931 !DANGEROUS LOAD-DO NOT USE!
+08.0 100 45.36 3495 2034 73672 11293 100.0 0.908 !DANGEROUS LOAD-DO NOT USE!
+10.0 102 46.20 3548 2096 77985 11368 100.0 0.886 !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 93 42.00 3393 1918 67863 10609 100.0 0.939 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 42.00 3112 1613 49335 10861 96.2 1.089

rick3 · Apr 3, 2015

DrMike,

Thanks, but...that's for a 75gr bullet, and I'm using a 100gr bullet...
Any chance you could run it again with the revised bullet weight?

rick3

DrMike · Apr 3, 2015

Maybe you want to change your bullet?

I was running another projection simultaneously and apparently left the 75 grain up when I ran yours. Thanks for catching the mistake. Which 100 grain Sierra are you running? 1540? 1550? Or 1560? I'll include each.

1540
Cartridge : .243 Win.
Bullet : .243, 100, Sierra SP 1540
Useable Case Capaci: 49.614 grain H2O = 3.221 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 22.1 inch = 562.0 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 30.72 2419 1299 33833 9009 96.9 1.438
-18.0 73 31.49 2470 1355 35853 9225 97.6 1.407
-16.0 75 32.26 2521 1412 37975 9431 98.2 1.373
-14.0 76 33.02 2572 1469 40204 9624 98.7 1.336
-12.0 78 33.79 2622 1527 42545 9805 99.2 1.300
-10.0 80 34.56 2672 1585 45003 9972 99.5 1.266
-08.0 82 35.33 2721 1644 47585 10126 99.8 1.233
-06.0 84 36.10 2769 1703 50296 10264 99.9 1.202
-04.0 85 36.86 2817 1762 53143 10388 100.0 1.172 ! Near Maximum !
-02.0 87 37.63 2864 1821 56133 10500 100.0 1.142 ! Near Maximum !
+00.0 89 38.40 2911 1881 59274 10608 100.0 1.114 ! Near Maximum !
+02.0 91 39.17 2957 1941 62574 10714 100.0 1.088 !DANGEROUS LOAD-DO NOT USE!
+04.0 92 39.94 3002 2001 66042 10818 100.0 1.062 !DANGEROUS LOAD-DO NOT USE!
+06.0 94 40.70 3047 2061 69688 10919 100.0 1.037 !DANGEROUS LOAD-DO NOT USE!
+08.0 96 41.47 3091 2122 73521 11019 100.0 1.013 !DANGEROUS LOAD-DO NOT USE!
+10.0 98 42.24 3135 2183 77555 11116 100.0 0.989 !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 89 38.40 2994 1991 68173 10303 100.0 1.048 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 89 38.40 2786 1723 50241 10840 98.7 1.203

1550

Cartridge : .243 Win.
Bullet : .243, 100, Sierra SP SemiSp 1550
Useable Case Capaci: 50.315 grain H2O = 3.267 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 22.1 inch = 562.0 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 70 30.72 2404 1283 33166 9030 96.7 1.449
-18.0 72 31.49 2455 1338 35128 9250 97.4 1.418
-16.0 74 32.26 2505 1394 37189 9460 98.1 1.388
-14.0 75 33.02 2556 1450 39352 9657 98.6 1.349
-12.0 77 33.79 2605 1507 41623 9843 99.1 1.313
-10.0 79 34.56 2655 1565 44005 10015 99.4 1.279
-08.0 81 35.33 2703 1623 46506 10173 99.7 1.246
-06.0 82 36.10 2752 1681 49129 10317 99.9 1.215
-04.0 84 36.86 2799 1740 51882 10447 100.0 1.184 ! Near Maximum !
-02.0 86 37.63 2846 1798 54770 10562 100.0 1.155 ! Near Maximum !
+00.0 88 38.40 2892 1857 57802 10673 100.0 1.127 ! Near Maximum !
+02.0 89 39.17 2938 1917 60984 10781 100.0 1.100 !DANGEROUS LOAD-DO NOT USE!
+04.0 91 39.94 2983 1976 64324 10887 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
+06.0 93 40.70 3028 2036 67832 10991 100.0 1.049 !DANGEROUS LOAD-DO NOT USE!
+08.0 95 41.47 3072 2095 71518 11092 100.0 1.024 !DANGEROUS LOAD-DO NOT USE!
+10.0 96 42.24 3116 2156 75391 11191 100.0 1.001 !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 88 38.40 2977 1968 66455 10367 100.0 1.059 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 88 38.40 2767 1700 49018 10883 98.6 1.217

1560

Cartridge : .243 Win.
Bullet : .243, 100, Sierra SPBT 1560
Useable Case Capaci: 50.616 grain H2O = 3.286 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 22.1 inch = 562.0 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 70 30.72 2401 1280 32888 8986 96.7 1.457
-18.0 71 31.49 2452 1335 34828 9206 97.4 1.426
-16.0 73 32.26 2503 1391 36864 9415 98.0 1.396
-14.0 75 33.02 2553 1447 39000 9612 98.6 1.359
-12.0 77 33.79 2602 1504 41241 9797 99.0 1.323
-10.0 78 34.56 2651 1561 43593 9969 99.4 1.289
-08.0 80 35.33 2700 1619 46060 10128 99.7 1.256
-06.0 82 36.10 2748 1677 48647 10272 99.9 1.224
-04.0 84 36.86 2795 1735 51361 10402 100.0 1.193 ! Near Maximum !
-02.0 85 37.63 2842 1794 54208 10518 100.0 1.164 ! Near Maximum !
+00.0 87 38.40 2888 1853 57195 10628 100.0 1.136 ! Near Maximum !
+02.0 89 39.17 2934 1911 60329 10737 100.0 1.108 !DANGEROUS LOAD-DO NOT USE!
+04.0 91 39.94 2979 1971 63617 10843 100.0 1.082 !DANGEROUS LOAD-DO NOT USE!
+06.0 92 40.70 3024 2030 67070 10947 100.0 1.057 !DANGEROUS LOAD-DO NOT USE!
+08.0 94 41.47 3068 2089 70695 11048 100.0 1.033 !DANGEROUS LOAD-DO NOT USE!
+10.0 96 42.24 3111 2149 74503 11148 100.0 1.009 !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 87 38.40 2973 1963 65747 10324 100.0 1.067 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 87 38.40 2763 1695 48514 10833 98.5 1.226

rick3 · Apr 4, 2015

DrMike,

Thanks for the info; that's perfect! I'm using the 1540 (FB) bullet right now, but I'm also going to test some other 100 grain (BT) bullets later, so the additional info will be helpful.

And I'm also going to try some 65-75gr bullets at some point, so even the first run info won't be going to waste.