Hi there all of you specialists!

I have been thinking about having one of my 30-06 rifles rebarreled for 25-06 cal. but my gunsmith has been coming up with the idea of changing to 6mm-06 or 6,5mm-06 instead. What do you all think of that considering I will be using heavy barrel with main focus on varminting on long ranges with the highest accuracy/presicion possible but also using the rifle for deer sized game. I also have to bear in mind that I will be reloading for the rifle and as far I understand the 6mm-06 and 6,5mm-6 are wildcats. The action is very good, Santa Barbara Mauser action in a Parker-Hale 1200 Super rifle and almost unused.

All the best and thanks in advance,
Kakali