358 Winchester 225 Nosler partition
- Thread starter jason1290
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DrMike
Ballistician
- Nov 8, 2006
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Code:
Cartridge : .358 Win.
Bullet : .358, 225, Nosler PART SP 44800
Useable Case Capaci: 46.064 grain H2O = 2.991 cm³
Cartridge O.A.L. L6: 2.760 inch = 70.10 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Ramshot TAC *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 95 43.65 2172 2357 40886 5483 86.8 1.301
-09.0 96 44.14 2197 2412 42290 5559 87.4 1.281
-08.0 97 44.62 2222 2467 43747 5634 87.9 1.262
-07.0 99 45.11 2247 2523 45260 5708 88.5 1.243
-06.0 100 45.59 2273 2580 46833 5780 89.0 1.225
-05.0 101 46.08 2298 2638 48467 5852 89.6 1.206
-04.0 102 46.56 2323 2696 50167 5922 90.1 1.189 ! Near Maximum !
-03.0 103 47.05 2349 2756 51934 5991 90.6 1.171 ! Near Maximum !
-02.0 104 47.53 2374 2816 53774 6059 91.1 1.154 ! Near Maximum !
-01.0 105 48.02 2400 2877 55688 6125 91.6 1.137 ! Near Maximum !
+00.0 106 48.50 2425 2938 57682 6190 92.1 1.120 ! Near Maximum !
+01.0 107 48.99 2451 3001 59760 6253 92.6 1.104 !DANGEROUS LOAD-DO NOT USE!
+02.0 108 49.47 2477 3064 61926 6315 93.0 1.087 !DANGEROUS LOAD-DO NOT USE!
+03.0 109 49.96 2502 3129 64185 6375 93.4 1.071 !DANGEROUS LOAD-DO NOT USE!
+04.0 110 50.44 2528 3194 66542 6433 93.9 1.056 !DANGEROUS LOAD-DO NOT USE!
+05.0 111 50.93 2554 3260 69004 6489 94.3 1.040 !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 106 48.50 2493 3106 63093 6294 95.1 1.079 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 106 48.50 2349 2758 52422 6026 88.4 1.167 ! Near Maximum !CCI200 will provide more than enough brisance to ignite the powder column on the 358 Win. CCI250 will raise chamber pressure, so you will want to keep an eye on the sigs of pressure.
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DrMike
Ballistician
- Nov 8, 2006
- 37,651
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I have always had good performance with my various rifles chambered in 358 Win using standard rifle primers. I have never found it neceessary to resort to magnum primers, and I have hunted in some very cold weather and used a variety of ball powders. The powder column is short, so the brisance is more than adequate for complete ignition. I questioned Remington primers at one point because they do produce low brisance, but even these primer are sufficient for complete ignition. You can use magnum primers, but I haven't found it advantageous for this cartridge. If it is all you have, then I could see using a magnum primer, with care to watch for excess pressure that could happen.
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- #5
I appreciate the insight. I have a lot more standard primers than I do magnum primers so that’s great.
I had another load I was using CCI 250 magnum primers with in this rifle. if I were to use the same load, just going with a standard primer in place of it, will I have to work up in charge weight to match the velocity?
I had another load I was using CCI 250 magnum primers with in this rifle. if I were to use the same load, just going with a standard primer in place of it, will I have to work up in charge weight to match the velocity?
DrMike
Ballistician
- Nov 8, 2006
- 37,651
- 6,952
Though pressure chamber pressure will almost assuredly be somewhat lower, you're always well advised to verify the safety of your work.
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- #7
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Dr. Mike, could I borrow your expertise one more time please? I’m working on doing some 225 Nosler Partition water jug tests and would like to do the testing with reduced loads to simulate lower velocity impacts at 300 yards or so (1800fps) Is there any way you could run the same components for me only with H4895 powder and starting loads of around 28 grains?
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- #9
