I would suggest trying H4831 and/or IMR 7828, and don't be afraid to compress them a reasonable amount if necessary.
Although I haven't used it, Reloader 22 should be near tops in velocity with the 210 grain.
I would like to suggest that you try the following:
Winchester cases
210 grain Nosler Partition
Federal 215 or 215M primer
Alliant Reloder 22 powder
In the over 10 rifles I have used this combination they all have achieve sub-moa accuracy at fine velocities.
Good Hunting !
Bendtsen
210 grain Partition
72 grains RL-19
Winchester brass
Federal #215 Lg Mag Rfl/pmr
Velocity 2860 f.p.s
Cartrage O.A.L set at 3.700 to ogive, as measured with a Stonypoint comparitore
This load produced an average three shot 100yrd .431" group, and average 100yrd .706" five shot group. Smallest 3 shot 100yrd group was measured at .344". This is out of a 100% factory 700 BDL SST/SYN W/DBM. This load was also listed as most accurate for this powder and bullet combo.
If you are interested in any other loads for the .338wm, let me know I have loads that I've developed using 200grn B/Ts, 225&250grn Speer G/Ss, 225grn N/Ps, 250grn N/PGs-MF, and Hornaday Interlocks in 200, 225, and 250Grn. All are under 1.0" for three shots at 100yrds, and most of the Nosler loads are ones that the Nosler manual lists as most accurate. One thing I've come to find out about the .338wm is that its not to picky about what reloads you feed it as long as you make them correctly, consistantly, and with consoistantcy being the key. My gun absulutely loves RL-22 and RL-19, but I got more than satisfactory results using IMR- 4831, 4350, and 7828. Its just with the RL-22, and RL-19 my gun will consistantly shoot 100yrd three shot groups under .5", with over a dozen groups btwm .360" & .400". I use RL-22 for all bullets over 210 grains, and RL-19 for all my 200 & 210 grain bullets.
Hoped this helped.
[This message has been edited by Big Foot 15-4E (edited 08-06-2001).]
I did try H-414 (a favorite powder) but the rifle didn't like it.
Steve