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Reloading The .300 Weatherby Magnum Rifle


(FN=Flat Nose, SP= Spire Point, HP= Hollow Point, RN= Round Nose), JHP= Jacketed Hollow Point, FMJ=Full Metal Jacket)

Loads for .300 Weatherby Magnum Rifle (The most powerful .30 caliber cartridge in the world):

(Note: These are MAXIMUM loads (unless otherwise noted), you should use 10% less to start.)
(See note on Powders below or read all about various Powders.)
Bullet is .308" diameter. Due to different barrel lengths, type of bullet, seating depth, primer type and other factors, you may not get near the FPS charted. It is just a guide and the reason you should start under these charges and work up.

-----------------------------------------
110 grain JSP (Jacketed Spire Point)
    H4895        76.0 gr.   3,839 FPS
    H380         78.0 gr.   3,752
    IMR4895      73.0 gr.   3,660
    IMR4064      75.0 gr.   3,674
    IMR7828      92.0 gr.   3,640
    IMR4831      84.0 gr.   3,676
    Reloader19   90.0 gr.   3,611
-----------------------------------------
125 grain JSP (Sierra Spitzer Point)
    H4895        71.0 gr.   3,478 FPS
    H380         75.0 gr.   3,501
    H4831        89.0 gr.   3,590
    H1000        94.0 gr.   3,277 (lower pressures)
    IMR7828      90.0 gr.   3,588
    IMR4831      82.0 gr.   3,494
    IMR4350      80.0 gr.   3,529
    IMR4320      72.0 gr.   3,419
    A8700        93.0 gr.   2,954
    A3100        85.0 gr.   3,392
    A4350        83.0 gr.   3,642
    VV N160      88.8 gr.   3,612
-----------------------------------------
150 grain JSP (Hornady Spire Point)
    H4895        69.0 gr.   3,325 FPS
    H380         72.0 gr.   3,323
    H4831        86.0 gr.   3,369
    H1000        94.0 gr.   3,279 (lower pressures)
    IMR7828      89.0 gr.   3,377
    IMR4831      81.0 gr.   3,324
    IMR4350      78.0 gr.   3,304
    A8700        93.0 gr.   2,950
    A3100        85.0 gr.   3,313
    A4350        79.0 gr.   3,333
    VV N160      83.6 gr.   3,282
    VV N165      90.8 gr.   3,300
    Reloader19   82.5 gr.   3,375
    Reloader22   88.0 gr.   3,460
-----------------------------------------
165 grain JSP (Spitzer Point)
    H4895        66.0 gr.   3,110 FPS
    H380         68.0 gr.   3,066
    H4831        84.0 gr.   3,339
    H1000        93.0 gr.   3,224
    IMR7828      87.0 gr.   3,272
    IMR4831      80.0 gr.   3,184
    IMR4350      75.0 gr.   3,151
    A8700        93.0 gr.   2,860
    A3100        85.0 gr.   3,233
    A4350        76.5 gr.   3,171
    VV N160      82.9 gr.   3,193
    VV N165      89.6 gr.   3,216
    Reloader19   80.5 gr.   3,250
    Reloader22   85.0 gr.   3,305
-----------------------------------------
180 grain JSP (Spitzer Point)
    H4350        74.0 gr.   2,990 FPS
    H380         64.0 gr.   2,900
    H4831        81.0 gr.   3,127
    H1000        91.0 gr.   3,152
    IMR7828      85.0 gr.   3,200
    IMR4831      78.0 gr.   3,014
    IMR4350      74.0 gr.   3,040
    A8700        93.0 gr.   2,835
    A3100        82.0 gr.   3,137
    A4350        74.5 gr.   3,059
    VV N160      80.0 gr.   3,038
    VV N165      86.7 gr.   3,079
    Reloader19   78.0 gr.   3,120
    Reloader22   80.0 gr.   3,115 (Nosler Partition bullet)
-----------------------------------------
200 grain JSP (Sierra Spitzer Point)
    H4350        71.0 gr.   2,770 FPS
    H450         70.0 gr.   2,744
    H4831        75.0 gr.   2,880
    H1000        81.0 gr.   2,897
    IMR7828      78.0 gr.   2,916
    IMR4831      74.0 gr.   2,766
    IMR4350      70.0 gr.   2,774
    A8700        93.0 gr.   2,787
    A3100        80.0 gr.   2,987
    A4350        73.0 gr.   2,942
    VV N165      83.1 gr.   2,949
    Reloader19   74.0 gr.   2,995
    Reloader22   78.0 gr.   2,970 
-----------------------------------------
220 grain Jacketed RN
    H4350        68.0 gr.   2,711 FPS
    H4831        74.0 gr.   2,707
    H1000        80.0 gr.   2,717
    H870         92.0 gr.   3,008
    IMR7828      75.0 gr.   2,647
    IMR4831      71.0 gr.   2,688
    IMR4350      67.0 gr.   2,656
    A8700        93.0 gr.   2,761
    A3100        77.0 gr.   2,810
    A4350        69.0 gr.   2,703
    Reloader19   71.0 gr.   2,709
    Reloader22   75.0 gr.   2,785
-----------------------------------------
250 grain Jacketed RN
    H4831        71.0 gr.   2,507 fps
    H1000        77.0 gr.   2,571
    H870         88.0 gr.   2,704
    IMR7828      73.0 gr.   2,556
    IMR4831      66.0 gr.   2,469
    Reloader19   67.0 gr.   2,516
    Reloader22   72.0 gr.   2,633
-----------------------------------------
Discussion: This is the most powerful .30 caliber cartridge in the world (commercially made). It can take any game in North America and any thin skinned game in the world. Depends on the type and weight of bullet. You have many choices from the 110 grain light varmint bullet to the 250 grain heavy-weights.

I have listed powders of IMR, Hodgdon, Alliant, VihtaVuori and Accurate. Use which ever you have handy. Slow burning powders generally work better in longer barrels and heavier bullets. 300 Mag. Cases will stretch, especially with hot loads, and you definitely need to check each in a case length guage and trim off excess brass. Of course, discard any cases that show a split anywhere on the case. For hunting at long distances with an unobstructed view, you should choose the spire point with a soft lead tip or a hollowpoint ( depending on the game).

There are a number of other high performance bullets on the market. The "boattail" is a very good long range target match bullet. It has very good wind performance. If you are shooting for precision, you should weight each powder charge and put exactly the same amount in each case.


Actually ALL 30 cal. bullets are .308 in diameter.


*
Reloader 7, 11, 12, 15, 19 and 22 are products of Alliant (formerly Hercules) Powders.
H380, H4350 and H4895 are products of Hodgdon Powders.
IMR 3031, IMR 7828, IMR 4831, IMR 4064 and IMR 4895 are products of IMR (formerly DuPont) Powder Company.
#2700, #4350, #8700 and #3100 are products of Accurate Arms Company
WMR, WSF, WSL, 760, 748, 680 and 540 are products of Winchester, Components Div.
N160, N165 and N140 are products of VihtaVuori Oy Ammunition Unit.

References: Accurate Arms Co. 1996 Reloading booklet - - Alliant Powder Co. Reloaders' Guide (1995) - - Hodgdon's Basic Reloaders Manual (1996) - - Speer Reloading Manual, #12 - - Winchester Reloading Components Manual, 14th edition - - Lyman Piston & Revolver Reloading Handbook, 2nd edition. - - VihtaVuori Oy Company, reloading booklet (1995) - - Numerous magazine articles on reloading special calibers and personal loads where noted.

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This page created 1/2/97 by M.D. Smith and last modified on August 1, 1997 ©