Could someone run a quickload calc?


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browningguy
July 30, 2007, 06:10 PM
I've been too forgetful to buy quickload and want to work up some loads for a .458 Winchester Mag using Speer 400 gr. SP bullets with Reloader 7 powder. I have loads for 300 gr. bullets, and 500 gr. bullets, but not 400's.

I'm thinking of starting at 64 gr. and working up, could anyone give me an idea of pressure and velocity through a 24" barrel. I really only want around 2200 fps, a soft load for a coyote hunt.

Thanks,

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Gizmo
July 30, 2007, 06:22 PM
Maybe this download will help

http://www.huntingnut.com/index.php?name=News&file=article&sid=3

Peter M. Eick
July 30, 2007, 08:07 PM
64 grns of RL7 for a 400 grn bullet is around 52klbs
64 grns of RL7 for a 500 grn bullet is around 83klbs
64 grns of RL7 for a 350 grn bullet is around 45klbs and gives a velocity of 2374 fps.

Please treat these as "round numbers" and work up carefully.

browningguy
July 30, 2007, 08:25 PM
Thanks very much guys.

GunTech
July 30, 2007, 10:06 PM
Per QuickLoad:


Cartridge : .458 Win.Mag.
Bullet : .458, 400, Speer FN 2479
Cartridge O.A.L. L6: 3.340 inch or 84.84 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : Alliant Reloder- 7

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.735% 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

-07.4 79 63.00 2253 4510 49760 4801 100.0 1.325
-06.6 80 63.50 2266 4559 50734 4825 100.0 1.314
-05.9 80 64.00 2278 4609 51725 4850 100.0 1.303
-05.1 81 64.50 2290 4659 52732 4874 100.0 1.292
-04.4 81 65.00 2303 4709 53756 4898 100.0 1.281 ! Near Maximum !
-03.7 82 65.50 2315 4759 54797 4922 100.0 1.270 ! Near Maximum !
-02.9 83 66.00 2327 4809 55856 4946 100.0 1.260 ! Near Maximum !
-02.2 83 66.50 2339 4859 56932 4970 100.0 1.250 ! Near Maximum !
-01.5 84 67.00 2351 4910 58026 4994 100.0 1.240 ! Near Maximum !
-00.7 85 67.50 2363 4960 59139 5017 100.0 1.230 ! Near Maximum !
+00.0 85 68.00 2375 5011 60270 5041 100.0 1.220 ! Near Maximum !
+00.7 86 68.50 2387 5061 61421 5064 100.0 1.210 ! Near Maximum !
+01.5 86 69.00 2399 5112 62590 5087 100.0 1.201 !DANGEROUS LOAD-DO NOT USE!
+02.2 87 69.50 2411 5163 63780 5110 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
+02.9 88 70.00 2423 5214 64990 5133 100.0 1.182 !DANGEROUS LOAD-DO NOT USE!
+03.7 88 70.50 2435 5265 66221 5156 100.0 1.173 !DANGEROUS LOAD-DO NOT USE!

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