G'Day All,
well as a CF BR shooter and FO shooter, here's my 2 cents worth.......
1. Barrel, Krieger, Shilen, Maddco, Truflight, Hart, Lilja......which ever you can source at a good price. They are all very good barrels, but their bore dimensions do vary from maker to maker. A tighter bore would be better for bullets like the lapua scenars which are smaller than SMK in dimensions. I've found the sierra MK & Bergers to very well made and shoot like 67gn elfs
2. Actions, any properly trued factory Action (i.e. Rem700) are as good as any BR action for accuracy. But a BR action (inc Barnards) usually handles higher pressures than a factory action can. Be aware that a BR action was designed for shooting free recoil off a bench and shooting fast. F class is NOT BR, its slower, and I have not yet proven to myself that free recoil is successful of lumpy ground compared to a rigid concrete bench. So I tend to hang onto the stock.
3. Triggers; weight of pull is not important as consistency is so although i like Jewel triggers A LOT, I would seriously consider the Barnard action & trigger as definate contenders. (small firing pin, ground true AFTER heat treating, plenty of after market accessories inc action wrench/tapered bases, comes with a GOOD trigger, variable bolt/port combo's, different recoil lug/bedding options, etc.
4. Stock, what ever you feel comfortable with, ask other shooters to let you use their rifles to find out what you prefer. However, the MBR style stocks and the trackers have very good reputations.
5. Scope, weaver 24x or 36x, good reliable scopes for the money and with 1/8moa clicks for FO.
Also with the Barnard you have several options for recoil lugs and 2 of them allow fast barrel changes. Unlike Remington style recoil lugs. that's one of the reasons for glues in's in BR. My F (O) class rifle is a glue in (ex BR rifle) and when I restock it to a more suitable stock for FO, it will also be a glue in..............because it works so well!
So, if the $$$ were not a problem then a Bat DS in a Shehane Tracker, with *** barrel, Jewel, 12-42 NF BR scope and gear stick rest (SEB) would ROCK!
However, Chris, being a BR shooter try to use as much of your existing BR gear to reduce costs as you can and hunting up an old BR rifle is an excellent way to enter f class. A sleeved Remy 6ppc opened up to a 308 bolt face will allow you to shoot a 308 in FS and switch barrels to shoot a 6BR or 6x47 lapua in FO.
Hope this helps!
Cheerio Ned