They will easily do 600-1k yards. Palma shooters do it with .308..
Go get a good drop in barrel.. Say a .308 Palma, 300 wm, whatever your caliber of choice is. I recommend shilen, and I recommend contacting Jim Briggs at northland shooter supply.
The pre-accutrigger can be safely tuned down to 2 lbs.. PM me with an address and I'll drop a reduced force trigger return spring in the mail to you.
Stocks, mcmillan, choate, manners, xlr, eliso.. all make very good stocks for the long action stagger feed rifles. I'm running a boyds thumbhole thats been pillar and glass bedded.
I've got less than 1k in the build minus scope..
Savage 110 stagger feed action
Boyds featherweight thumbhole stock, pillar and glass bedded (wont support a full on bull barrel)
Shilen match barrel, 1:10 RH twist, 24" .716 muzzle, recessed target crown
Competition recoil lug
Trued barrel nut
Trigger tuned down to 2 lbs, no creep
Weaver bases
Millet Angle Lock rings
Bushnell Elite 3200 4-12x40 AO
Shoots sub 1/2 moa without much tweaking.. and I suspect I'll see .25 from it pretty consistently once I find it's preferred load.
If you google "chronicles of building a match savage".. the VAguntrader.com link is my rifle and the build that I did.