Wow Zeke, that's light load! Most manuals list 48.0gr as starting for H4831,AA3100, RL22, ....
I use 45.0gr of IMR4831 in my .257Roberts and 115-117gr bullets. Get's about 2,900fps. The Berger 115gr VLD is amazing......
For the .25/06, I've only loaded 100gr and higher.
Best results have been with H4350 (100gr w/50.0gr) and H4831SC 117-120gr @52.0gr.
I've found that there's a bit of variability in the throats/ chambers/ actions so work up powder charges carefully...
A friend that hunts in PA every year and uses IMR4320 and 117gr Sierra BTHP, @ 43.0gr I believe. He gets very tiny groups from his Interarms MkX, and about 2,900fps, or about what I get from my two "Bobs".
But, that ain't no slouching though......Deer don't seem to be able to tell the difference.....
All my lighter wt' bullet experience with the .25's has been with the .257Roberts. My two longest deer kills have been with the 75gr Hornady HP W/H380 powder@ 3,500fps(whitetail doe at ~340yds) and 85gr Nosler B.T w/H414 @ 3,350fps(muley doe at 378yds).
Neither bullet was recovered and both deer were d.r.t.(spine/shouder shots).