Here's an example of a good tactical rifle (be sure to read it all the way to the end as the rifle starts out as a single shot hunter and transforms...)
My 260 by MCR
For a 'tactical' rifle, the big magnums are not very well suited for that. To me, 'tactical' means the rifle is stable enough to shoot longrange yet nimble enough to be carried and shot off-hand and in various other positions.
As an example, here's my 300RUM. It is an awesome longrange rig, but I would not consider it 'tactical'
My 300RUM by MCR
Since you have a 7mm barrel, look at 7SAUM and 284Win. Both terrific cartridges that will send high BC bullets fast (especially the 7saum as it will shoot the Berger 180grain hybrids at 2900+)
My recommendation would be to put a brake on it.