I don't load for the Tikka in 7-08, but I do load for a Rem Mod 7, chambered for that cartridge.
I find that H414 and W760 seem to be the best for the 150 grain 7mm bullets, in my rifle. NOT MONOLITHICS
I really like this little cartridge a lot. It's parent case is extremely versatile for all sorts of customizing.
My rifle has an after market, 24 inch barrel and will give me close to 2700 fps with 47 grains of w760 over CCI 250 primers.
By your question, I am assuming your rifle is a Tikka T3, which is a very strong rifle.
My load is right on maximum as far as the manuals go but it's very accurate, again in my rifle.
Several of my friends use this load in their 7-08s. They all claim accuracy is better than any factory load they've tried. Pressures are in the 50K CUP range.
I haven't made any changes to this load or the bullets I use with it in over 20 years, It's not broken, so doesn't require fixing.