Gambler,
Remember that the big 5 is also just what you're seeing on this board. There are other 'smiths that build incredible shooting RFBR guns. Check out the names Penrod, Taylor, Knippenberger for this year alone. Check out Loggins, Leger, Hongisto, Messer, Kenyon and Ross for historical references. There is a lot of weight on the shooters to perform though. Remember they are the ones actually testing, tuning and performing (competing) with these guns. They must be in tune, with the right ammo and have great equipment to have great results.
Carp