quickload request

[coldmaker]

hi!
a friend of mine wants load info to load the barnes LRX in is 300WSM using imr 4350.
i first recommanded i'm to contact Barnes via email, has i have always had quick answers.
but it's been more than a week.
can some of you with quickload help me (him) please?

thanks

 

[bigedp51]

Need to know bullet weight and internal case capacity of case in grains of water, default Quickload case capacity is 81.30 grains of H2O
Chuck Hawks lists it as .300 WSM (W-W): 79.0 grains
http://www.chuckhawks.com/rifle_case_capacity.htm

Without actual case capacity anything from Quickload will be a ball park estimate and pressures and velocities estimates will be off.

 

[coldmaker]

weight is 175gr. and i dont know case capacity
thanks

 

[bigedp51]

I have the latest version of Quickload V 3.6 BUT it doesn't list a 175 grain Barnes LRX bullet?

 

[coldmaker]

I have the latest version of Quickload V 3.6 BUT it doesn't list a 175 grain Barnes LRX bullet?

here's how it's written from another report if it helps

Bullet : .308, 175, Barnes 'LRX'BT 308807

 

[bigedp51]

here's how it's written from another report if it helps

Bullet : .308, 175, Barnes 'LRX'BT 308807

Quickload doesn't list a 175 grain Barnes bullet, it lists 168 grain and 180 grain bullets. Below is for the 175 grain Sierra HPBT MatchKing 2275

The data below is ball park for pressure and velocity, because the bullet is different and internal case capacity is estimated. START LOW and work up to your maximum load for safety.

Cartridge : .300 WSM (CIP)
Bullet : .308, 175, Sierra HPBT MatchK 2275
Useable Case Capaci: 72.818 grain H2O = 4.728 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 26.0 inch = 660.4 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 80 53.20 2482 2393 34027 7858 93.1 1.571
-18.0 82 54.53 2539 2505 36236 8078 94.1 1.532
-16.0 84 55.86 2596 2619 38565 8290 95.0 1.490
-14.0 86 57.19 2653 2735 41037 8493 95.9 1.447
-12.0 88 58.52 2710 2853 43661 8685 96.7 1.406
-10.0 90 59.85 2766 2974 46447 8868 97.4 1.366
-08.0 92 61.18 2823 3096 49407 9038 98.0 1.328
-06.0 94 62.51 2878 3220 52550 9197 98.5 1.292
-04.0 96 63.84 2934 3345 55892 9343 99.0 1.256 ! Near Maximum !
-02.0 98 65.17 2989 3473 59445 9475 99.3 1.222 ! Near Maximum !
+00.0 100 66.50 3044 3601 63226 9594 99.6 1.190 ! Near Maximum !
+02.0 102 67.83 3099 3732 67253 9698 99.8 1.158 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 69.16 3153 3863 71544 9787 100.0 1.127 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 70.49 3207 3996 76122 9860 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 71.82 3260 4129 81010 9924 100.0 1.069 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 73.15 3313 4264 86235 9985 100.0 1.042 !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 100 66.50 3153 3862 74034 9259 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 66.50 2889 3244 52581 9558 95.8 1.289

 

[cdn shooter]

I would use caution with your loads before the max listed above. I've used IMR 4350 in the 300wsm quite a bit and 67gr starts to create heavy bolt lift with 168 bullets and I use 66gr as max. I would think max loading is going to fall somewhere between 64-65gr for the 175's in rifles with standard throat lengths. This is using standard rifle primers as well, not magnums.