sorry bit late to the party but I am currrently finalising load development for a 30-06ai Mk v Weatherby ultralight it's got a fluted pencil thin barrel 24" long and weighs 3kg on the button scoped ready to go.
and yup even with the greystone titainium (radial) muzzle brake it's still quite lively to shoot running 178gn elm's at 2950ish fps, it's got more than enough snot out to much further than I'll likely ever need and looks to be a 1/2" 3 shot group shooter (pending final verification on Monday).
I'll probably change to a dedicated directional brake to help reduce recoil (well actually the recoil is managable but it certainly gets a fair whack of muzzle jump) it's not difficult to accurately shoot a light weight sharp recoiling rifle, it just takes practice.
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