By "reamer print", I meant the drawing of of the reamer form the reamer grinders themselves, with all the measurements. Dave Kiff at Pacific Tool and Gauge will send you any prints you want. I use Pacific chambering reamers now exclusively although I've used Clymer and Manson reamers too. I now prefer the Pacific & have had excellent customer support and good raport' with them.
: I am currently considering re-barreling my Ruger #1 .218 Bee to the .375/03 that Paul Mathews and his son worked on some time ago. For North American game where I hunt, it's a excellent round. As you say, .303 brass is very plentiful in Commonwealth countries.
: Keep me/us posted on your #1 Project
: A full sized Martini with custom stock would also be a fun project for your .303, and perhaps easier to find for you.