Just back from the range with some chrono. results for the new Searcy in 500 Nitro.
Here goes:
AR2213sc(?sold US as H4831sc?),CCI 250 Primer,
HDS brass,24" barrels
570 gn Woodleigh Soft,110gns powder,12ft from muzzle-1965 fps

570 gn Woodleigh soft,115 gns powder,12ft from muzzle-2060 fps

570 gn Woodleigh soft,117 gns powder,
12ft from muzzle,2104 fps-good regulation

570 gn Woodleigh SOLID,112 gns powder,
12 ft from muzzle-2050 fps

570 gn Woodleigh SOLID,115 gns powder,
12 ft from muzzle-2100 fps-perfect regulation
right on top of the bead at 50 mts,one inch apart Rt & Lt barrels.

These are compressed loads but should do well with a drop tube.

Others loads please?

Wombat

Try sending 500 grains a pm, he uses the same rifle and has just recently posted hois own groups on the NE forum, he has some great results using Bridgners and GS custom togehter with all load date

Keep in mind that 4350 delivers a lot less recoil at the same MV as 4831....That was always important to me in the 500.