The 125 gr is pushing the lower limit on weight in .323. They really fall under the desirability curve as far as ballistic coefficient is concerned. But I am wondering what you mean exactly by "improve my ballistics"? I'm guessing you are wanting a lighter bullet to get more velocity and flatter trajectory.
Unless you are varminting with your .323 caliber (which is far from the ideal caliber for this application anyway), you will probably be better off with a 150 grain or better bullet, even with a little more bend in the trajectory and slower velocity. Your terminal performance on medium to heavy game is going to be much better, at least in my experience. What little you gain in trajectory with a lighter bullet is more than made up for in terminal performance with heavier bullets in the .323 caliber. Where the .323 really shines is in lofting 180-220 grain bullets at modest velocities, resulting in killing power quite capable of bringing down all but the African heavies with ease.
I would recommend letting your .323 do what it was born to do. My favorite bullet in .323 is the 185 gr Remington corelokt for deer and hogs. They are nothing but sensational in the field.
