I have two.
24" #3 contour barrel on FN Mauser, with an early laid-up fiberglass stock that I refinished nicely. Other is an original Springfield barrel on a very early double heat treat '03, was already cut to 19" carbine when I got it. bore was shot out. Sent it to JES for rebore to .338-06. Walnut stock I have re-profiled and slimmed down to a nice classic form. Decelerator pads on both.
The Mauser likes the 225 Partition with 2000-MR the best so far. Gets 2700fps easy with that. 2000-MR has been a wonder powder in my 35 Whelen AI so I gave it a try in the .338.
So far the '03 carbine likes 61-62 gr Big Game with the 210 partition best.
Load work isn't mature by any means for either, as they are both less than one year new to me, but I plan to use one or the other for my cow tag in AZ this September. Haven't shot either at a critter yet.