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303 British - 200 grain loads

Warning!!

The load data presented here was safe in the test rifle and
is presented for informational purposes only.
Use extreme caution, working up in small increments.
If in doubt as to the load's integrity, STOP !
I can assume no responsibility for improper or careless use.

200 grain Mk 9 (.313 diameter)
3.000 inches OAL
Winchester Cases, Winchester LR Primers

This data is for a 200 grain jacketed bullet that I make. It is a semi-spitzer, produced in either .313 or .314 diameter and available seasonally. To date, it has accounted for numerous moose and deer.

303close.JPG
180 gr. Sierra - left. My 200 gr. SP - right.

Powder
Minimum
Maximum
H380
39.5 grains
MV - 2145 fps
43.5 grains
MV - 2247 fps
N150
38.5 grains
MV - 2228 fps
42.5 grains
MV - 2349 fps
H4350
42.5 grains
MV - 2169 fps
46.5 grains
MV - 2381 fps