Posted by Pete van Meurs on Dec 15, 2011; 11:08am
URL: http://oldforum.flyshooter.com.au/The-Perfect-Fly-rifle-tp5076487p5077150.html

Although I concur with many  of Anthony's suggestons my experience both as a constructor and shooter over ten or more years brings in a few other ideas. As for the cartridge - experience has shown that ultimate accuracy (potential of .1 moa) will be found with the smaller cases relative to their bore size.
The popularity of the 6mmBR and its derivatives (6mm Dasher/BRX) is testimony to this . Other combinations tend to lead to increased recoil, although the 6.5x47 Lapua  seems to be able to deliver that slightly bigger bullet hole without too much recoil and still offer that .1 moa accuracy using the bullet range of 120 to 130gn, but for no improvement in sheer accuracy.
The 6.5/284 has long been a standard choice  and continues to this day. It has the better ballistics but has an accuracy potential of probably about .2 moa. I always have both a 6mmDasher and a 6.5/284 on hand for this (LG) class and will choose to suit the conditions. My advice is that if you have to settle on one or the other  - go with the 6mmBR or it's derivatives. They are cheap to set up for and cheap to feed.
Barrels - Anthony mentioned only Lilja for reasons  unknown to me. Any of the well-known makers of match-grade barrels have been seen in the results lists. My personal preference is the Australian made Maddco. I have used Maddco barrels almost to the exclusion of all others in my years as a competetve shooter and can highly reccomend them.
Actions - Despite owning a number of rifles built on 'Custom' actions I seem to have collected most of my trophies shooting with Remington based rifles. For sheer user-friendliness there is no question that a 'Custom' action is the way to go. Any Stiller, Stolle, Nesika, Bat etc will do the job. But never think that accuracy will be enhanced by your choice of action. Accuracy is all about the three "B's" - Barrels, Bullets, Butt-nuts.
Stocks - personal preference  here when it comes to shape or material. Most of our rifles use laminated wood stocks made by Ken Noye (03-53671062) - an Aussie product.
That's it for now.
Pete