THERE IS NOTHING WRONG WITH YOUR LOAD OF 3.1 GR 231. A VERY WELL ESTABLISHED LOAD FOR DECADES. THAT BEING SAID, YOUR BULLET CHOICE IS ANOTHER THING. TRY ZERO BRAND 148 GR SWAGED HBWC, OR THE REMINGTON 148GR S WAGED HBWC. REMEMBER TO SEAT FLUSH OR SLIGHTLY BELOW FLUSH WITH MED HEAVY ROLL CRIMP. JP