Handloading for my 25-06

[Bluegunner]

Two years ago I purchased a Semi Browning Bar in 25-06 calibar.
I have been using it for hog hunting and have fallen a 140# sow and 240# boar with one shot each, range under 100 yds, factory loads.
However in Janurary, tried using this same gun for yotes and trying shots at 2-3 hundred yards, found myself missing.
Checking with Browning they advised that at 100 yds the Bar should hold a 2" grouping. Well 2" is fine at 100 yds but becomes a problem at 2-3 hundred yards.
My question? I have been advised that finding the right load (I can hand load) could bring that down to 1" at 100 yds. Do you ladies and gentlemen agree or disagree and if you agree, how do I find that load? What procedure should I follow?

Bluegunner