Re: 7 mm Ultra Mag Reloading Tips ( 7mm Tejas )
If it is an improved 7RUM then you could start with 7RUM loads, be careful reducing loads too much though as I have heard people have had problems downloading the slow burning powders that work best in the 7RUM.
Most people recommend downloading 10% and then work up. You probably need to only reduce loads about 5%.
Retumbo is probably a good powder to use.
Hope this helps.