cjwils wrote on Aug 3^rd, 2011 at 12:15am:

I have not done this myself, but some other people on this forum say they have good success using .303 British brass, after running it through a 30-40 resizing die.

I HAVE done this and have had good results with it.  Much better to use .30-40 brass, but several years ago I could not find .30-40 and yet I had plenty of .303 lying around.  Full-length size the .303 through a .30-40 die and it is almost exactly the same as .30-40 except for one thing--the neck of the .303 is shorter.  This results in the overall round being shorter and the bullet sitting farther away from the rifling when fired. The shorter neck causes no problems in the short term.  Long term, you might cause some erosion to the throat area after thousands of rounds, but shouldn't be a problem for the casual shooter. Had pretty good accuracy from it too!

daveboy