Reloading The .243 Winchester Rifle

Posted on: Tuesday January 5, 2021
Reloading The .300 Winchester Magnum Rifle
MD Smith

MD Smith

The .243 Winchester Rifle

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

Loads for .243 Winchester Rifle:

(Note: These are near maximum loads, you should use 10% less to start.)
(See note on Powders below or read all about various Powders.)
Bullet is .243″ 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.

60 grain JHP (Sierra Hollow Point)
Reloader 1238.5 gr.3,450
Reloader 730.2 gr.3,320
75 grain JHP (Speer Hollow Point)
H38043.0 gr.3,410
H489539.0 gr.3,406
Reloader 1234.0 gr.3,125
A270045.0 gr.3,498
A310048.0 gr.3,216
76043.0 gr.3,320
80 grain JSP (Speer Spitzer Point)
IMR 303139.5 gr.3,260
IMR 489541.0 gr.3,305
H38041.0 gr.3,188
H489537.0 gr.3,200
Reloader 1234.0 gr.34.0 gr.
Reloader 1536.5 gr.3,145
A270042.0 gr.3,233
A310047.0 gr.3,271
76043.5 gr.3,280
WMR 47.5 gr.3,250
100 grain JSP (Speer Spitzer boat-tail)
IMR 303135.5 gr.2,825
IMR 489537.0 gr.2,910
H38038.0 gr.2,940
H489536.0 gr.2,938
Reloader 1941.0 gr.2,925
Reloader 2241.7 gr.2,950
A270036.0 gr.2,753
A310043.0 gr.2,966
WMR44.7 gr.3,000

Discussion: The .243 is fast and flat. I have listed powders of IMR, Hodgdon, Alliant and Accurate. Use which ever you have handy. Slow burning powders generally work better in longer barrels and heavier bullets. .243 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. The .243 is really better for long-range, open country and not so much for the brush and woods. But any clear shot with it is deadly.
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. Each case should be exactly on specs.


2400, Reloader 7, 11, 12, 15, 19, and 22 are products of Alliant (formerly Hercules) Powders.

H380, H450 and H4895 are products of Hodgdon Powders.
IMR 3031 and IMR 4895 are products of IMR (formerly DuPont) Powder Company.
No. 2, No. 5, #2230, #2700, #3100 and #2460 are products of Accurate Arms Company
WMR, WSF, WSL, 760, 748, 231 and 540 are products of Winchester, Components Div.
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.