Posted by Steven Butcher on Dec 16, 2011; 12:15am
URL: http://oldforum.flyshooter.com.au/The-Perfect-Fly-rifle-tp5076487p5078991.html

This was asked at the range and the response from the C/F guys was to use 308win.

I've got a spare Omark that I'm looking to build a 6mm BR-K (6BR that has the 243 Win case length) this is to use for F-Open and Fly.