Re: 210 gr. TTSX from a .338 Ultra Mag.
A few years back I was shooting 210 barnes xlc out of my 338 rum. My recipe was 97 gr of rl 22 and it gave me a mv of 3350. I use reloader 25 now with my 225 accubonds, 97 grs. Retumbo will probably be too slow burning to get max velocity, same with h-1000 with the lighter bullets.
Remington model 700 300 RUM LH 26" rem ss/blued receiver lam stock 215 Berger @3070/180 NAB @3300/Leupold 6.5-20x50
Remington model 700 338 RUM LH 26" Bartlein 5C #4 Muscle Brake, blueprinted action, sako extractor, jewell trigger, bell and carlson Alaskan stock/Black cera coat/Sightron SIII 8-32x56 moa reticle, external elevation turret
Savage LH 22-250/Sightron 4-16