When I had a 338 RUM I was getting 2720fps with the 300 gr SMK using 87.5grs of H1000 out of a 28" 1-10" twist Hart barrel, went up to 92grs and was aroung 2800fps.
Seeing that you have a slightly larger case then the 338 RUM I think that 94grs should not be a problem.
I would also try Retumbo, you should get higher velocities with it over H1000.
Would it be possible to get a pic posted of your 338 Tejas case fireformed next to one that has not been fireformed so we can see the difference?
Wayne aka WAMBO