Some 40 years ago I put together a 30-06 on a FN 98 action.
At the time I was out of 4350 and 4831, my go to powders.
I had some IMR4064 and loaded up some with 50 grains of 4064 pushing a 165 gr Sierra hp at around 2900 fps.
From the get-go it shot .75 to 1" groups with that load.
While it sounds like you have your new rifle shooting well, sometimes we are surprised by what a particular rifle likes.
At the time I was out of 4350 and 4831, my go to powders.
I had some IMR4064 and loaded up some with 50 grains of 4064 pushing a 165 gr Sierra hp at around 2900 fps.
From the get-go it shot .75 to 1" groups with that load.
While it sounds like you have your new rifle shooting well, sometimes we are surprised by what a particular rifle likes.