88.0 grains H1000 with a 300 grain Berger Elite Hunter and a Fed 215 works well for .3 MOA in fireformed Lapua cases.
Although it's not H1000, 98.0 grains of RL33 and a CCI 250 works well with a 285 ELD M also in fireformed Lapua cases. This one produced a .4 MOA four shot group at 340 yards from a cold clean bore.
Any of the listed loads for Hornady 285s will give you a good idea, as the ELDs shouldn't be far off. Of course as always, start 10% lower and work your way up to look for pressure signs.
I'm at the NRA show right now and can't remember my exact load and don't want to misquote. If I remember when I get back, I'll post one up.
edit: so I went back to the thread I linked above and reminded myself where I was with that load.
Savage 110 FCP, bedded with 26" barrel
Lapua brass
Winchester WLRM primers
Hornady 285g HPBT
less than mag length
91.5g H1000
2780 fps
bugholes
Lapua Brass
215m Primers
Retumbo @ 91.8
285 ELD-M
AVG FPS = 2814
C.O.A.L 3.785 Just fits in AI-PSR mag
Just re-zeroed this load and got .447 avg over 3 groups of 5 rounds and have shot out over 1800 yards.