QL request for the .300 Winchester Magnum

[lowmileage]

I'd be grateful if I could get a QL report on these 3 rounds, thanks, Fred

Winchester 300 Win Mag.
Browning A Bolt, 26” barrel

200 grain Nosler Partition
71 grains IMR 4831, WLR Standard/Magnum primers
RP Cases, 3.372” case with bullet OAL
91 grains case water capacity

180 Nosler Partition
73 grains IMR 4831, WLR Standard/Magnum primers
RP Case length unknown, assume 3.340” OAL with bullet
91 grains case water capacity

150 Sierra Pro Hunter Spitzer
74 grains UMR 4831, WLR Standard/Magnum primers
3.352” OAL case with bullet
91 grains case water capacity
SD: .225, BC .409

When originally used back in the early 90's with a Chrony I bought at the time, my velocities which appear a bit optimistic are :
200 grain Nosler = 3000 fps
180 grain Nosler = 3200 fps
150 grain Sierra = 3345 fps


I DO NOT RECOMMEND that anyone use these loads as THEY MAY NOT BE SAFE IN YOUR RIFLE. Approach maximum loads with caution.

 

[IdahoCTD]

Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 200, Nosler PART SP 35626
Useable Case Capaci: 79.740 grain H2O = 5.177 cm³
Cartridge O.A.L. L6: 3.372 inch = 85.65 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 4831

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 81 56.80 2478 2727 37883 9016 99.6 1.617
-18.0 83 58.22 2532 2846 40382 9174 99.8 1.569
-16.0 85 59.64 2585 2967 43028 9315 100.0 1.521
-14.0 87 61.06 2637 3088 45832 9438 100.0 1.477
-12.0 89 62.48 2689 3210 48802 9556 100.0 1.434
-10.0 91 63.90 2740 3333 51948 9671 100.0 1.394
-08.0 93 65.32 2790 3457 55283 9784 100.0 1.355 ! Near Maximum !
-06.0 95 66.74 2840 3581 58817 9895 100.0 1.317 ! Near Maximum !
-04.0 97 68.16 2889 3707 62565 10002 100.0 1.281 ! Near Maximum !
-02.0 99 69.58 2938 3833 66542 10107 100.0 1.246 !DANGEROUS LOAD-DO NOT USE!
+00.0 101 71.00 2986 3960 70764 10209 100.0 1.213 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 72.42 3034 4089 75249 10308 100.0 1.181 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 73.84 3082 4219 80016 10404 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 75.26 3130 4350 85089 10497 100.0 1.120 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 76.68 3177 4483 90492 10586 100.0 1.092 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 78.10 3224 4617 96252 10672 100.0 1.064 !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 101 71.00 3062 4163 83185 9904 100.0 1.137 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 71.00 2872 3664 58175 10657 100.0 1.317 ! Near Maximum !

 

[IdahoCTD]

Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 180, Nosler PART SP 16331
Useable Case Capaci: 80.835 grain H2O = 5.249 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 4831

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 82 58.40 2579 2658 36598 9158 98.7 1.567
-18.0 84 59.86 2637 2779 39054 9343 99.2 1.520
-16.0 86 61.32 2694 2901 41662 9511 99.6 1.474
-14.0 88 62.78 2751 3024 44430 9661 99.8 1.430
-12.0 90 64.24 2807 3149 47367 9792 100.0 1.388
-10.0 92 65.70 2862 3275 50486 9904 100.0 1.347
-08.0 94 67.16 2917 3401 53798 10011 100.0 1.308
-06.0 96 68.62 2971 3528 57317 10115 100.0 1.271 ! Near Maximum !
-04.0 98 70.08 3024 3656 61055 10217 100.0 1.235 ! Near Maximum !
-02.0 100 71.54 3077 3785 65030 10316 100.0 1.201 !DANGEROUS LOAD-DO NOT USE!
+00.0 102 73.00 3130 3915 69260 10411 100.0 1.168 !DANGEROUS LOAD-DO NOT USE!
+02.0 104 74.46 3182 4046 73762 10504 100.0 1.137 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 75.92 3233 4178 78560 10593 100.0 1.106 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 77.38 3284 4311 83676 10679 100.0 1.076 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 78.84 3335 4446 89138 10761 100.0 1.048 !DANGEROUS LOAD-DO NOT USE!
+10.0 113 80.30 3386 4583 94976 10839 100.0 1.021 !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 102 73.00 3217 4135 81818 10077 100.0 1.092 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 73.00 2997 3590 56629 10878 99.8 1.272 ! Near Maximum !

 

[IdahoCTD]

Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 150, Sierra SPBT 2125
Useable Case Capaci: 85.123 grain H2O = 5.527 cm³
Cartridge O.A.L. L6: 3.352 inch = 85.14 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 4831

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 79 59.20 2628 2301 30289 8931 94.6 1.563
-18.0 81 60.68 2691 2412 32278 9175 95.6 1.524
-16.0 83 62.16 2753 2524 34388 9406 96.5 1.486
-14.0 85 63.64 2815 2639 36629 9624 97.3 1.449
-12.0 87 65.12 2876 2756 39006 9827 98.0 1.407
-10.0 89 66.60 2938 2874 41529 10015 98.6 1.366
-08.0 91 68.08 2998 2994 44205 10186 99.1 1.327
-06.0 93 69.56 3058 3116 47045 10340 99.5 1.289
-04.0 95 71.04 3118 3238 50058 10476 99.8 1.252
-02.0 97 72.52 3177 3362 53257 10593 99.9 1.217
+00.0 98 74.00 3236 3487 56653 10690 100.0 1.183 ! Near Maximum !
+02.0 100 75.48 3293 3612 60261 10777 100.0 1.151 ! Near Maximum !
+04.0 102 76.96 3350 3738 64096 10860 100.0 1.119 !DANGEROUS LOAD-DO NOT USE!
+06.0 104 78.44 3407 3865 68174 10941 100.0 1.089 !DANGEROUS LOAD-DO NOT USE!
+08.0 106 79.92 3463 3993 72515 11018 100.0 1.060 !DANGEROUS LOAD-DO NOT USE!
+10.0 108 81.40 3518 4122 77137 11092 100.0 1.032 !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 98 74.00 3356 3751 67508 10291 100.0 1.097 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 74.00 3056 3111 45931 10833 97.3 1.298

 

[IdahoCTD]

Cartridge : .300 Win. Mag.(SAAMI)
Bullet : .308, 150, Sierra SP 2130
Useable Case Capaci: 84.729 grain H2O = 5.501 cm³
Cartridge O.A.L. L6: 3.352 inch = 85.14 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 4831

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 79 59.20 2633 2308 30490 8945 94.7 1.557
-18.0 81 60.68 2695 2420 32498 9188 95.7 1.518
-16.0 83 62.16 2758 2533 34632 9419 96.6 1.480
-14.0 85 63.64 2820 2648 36896 9636 97.4 1.443
-12.0 87 65.12 2881 2765 39300 9839 98.1 1.401
-10.0 89 66.60 2943 2884 41852 10025 98.7 1.360
-08.0 91 68.08 3003 3005 44560 10195 99.2 1.320
-06.0 93 69.56 3064 3126 47434 10348 99.5 1.282
-04.0 95 71.04 3124 3250 50485 10482 99.8 1.246
-02.0 97 72.52 3183 3374 53725 10598 100.0 1.211
+00.0 99 74.00 3241 3499 57167 10694 100.0 1.177 ! Near Maximum !
+02.0 101 75.48 3299 3625 60825 10779 100.0 1.145 ! Near Maximum !
+04.0 103 76.96 3356 3752 64714 10862 100.0 1.113 !DANGEROUS LOAD-DO NOT USE!
+06.0 105 78.44 3413 3879 68853 10941 100.0 1.083 !DANGEROUS LOAD-DO NOT USE!
+08.0 107 79.92 3469 4008 73260 11018 100.0 1.054 !DANGEROUS LOAD-DO NOT USE!
+10.0 109 81.40 3524 4137 77956 11092 100.0 1.026 !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 99 74.00 3361 3763 68134 10293 100.0 1.092 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 74.00 3062 3123 46334 10845 97.4 1.291

 

[IdahoCTD]

That is both a boattail and flat base Sierra. I think the Pro Hunters are flat base but I ran both.

 

[lowmileage]

That is both a boattail and flat base Sierra. I think the Pro Hunters are flat base but I ran both.

Thanks Idaho, yes the 150 I used is Flat base, "pretty close, I'm impressed!

ME QL
200 Nosler 3000 2986
180 Nosler 3200 3130
150 Speer 3345 3241

Many thanks.

 

[IdahoCTD]

The Partition loads says they are way up in the pressure.

 

[lowmileage]

The Partition loads says they are way up in the pressure.

I see that. No pressure signs in my rifle. I will say it kicks like hell at the bench. Thanks. When I get to shooting it again, I might throttle back a bit. I do not recommend that anyone else attempt to use these loads as they might be dangerious in their rifle. Work up to maximum loads with caution.

 

[SJB358]

The Partition loads says they are way up in the pressure.

I see that. No pressure signs in my rifle. I will say it kicks like hell at the bench. Thanks. When I get to shooting it again, I might throttle back a bit. I do not recommend that anyone else attempt to use these loads as they might be dangerious in their rifle. Work up to maximum loads with caution.

How many firings do you get outta your case lowmileage?

 

[Elkman]

Interesting discussion, i have been loading a very similar powder charge using H-4350 behind the 180 PT since the 70's and have no issues whatsoever. It's very accurate and have never had a case failure, however I really watch the area forward of the belt with every loading.