Thread: Chamber pressure, expansion ratios and muzzle pressure

Originally Posted by NO4

@akaroa1 what calibre?

7x57R into a very light sporting 303

Like I say it's a huge call for me to bore and line a rare 303 single shot.
But that into a smaller caliber, but factory offering in that make and model is vastly more favorable than a re barrel to the original caliber because the patina and makers roll marks are preserved.

We’re Lee speeds originally offered in 7x57R?


Sent from my iPhone using Tapatalk

Originally Posted by Dicko

We’re Lee speeds originally offered in 7x57R?


Sent from my iPhone using Tapatalk

Cut-n-paste

Normal Lee Speed 'factory' chamberings were .303, 7x57R and 8x57R, .375 NE, and the .405 Winchester

But this is a single shot rifle