The
correct diameter for 303 British bullets is .313 to .314
Click here for an explanation.
The
Mk 9 bullet is .3135" diameter
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PLEASE NOTE:
I include load data for ten (10) powders
in every box of bullets
Re 15, H380, N140, N150, N550, W760, H414, N160, IMR4350, H4350
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Ruger's new No. 1 rifle
is built according to the original plans,
which means a .314 to .316 inch barrel.
Ruger followed the original specifications!
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For older rifles like Lee Enfields or P14s, it is best to slug your barrel,
but these
rifles have .313/.314 bores.
Using undersized bullets
is why these rifles don't always group the best!!
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