I have a Remington 700P that I bought about 5 years ago. I put a Leupold VXIII 4.5-16 on it in Leupold rings.
My gun won't shoot the 150-155 gr. bullets worth a hoot. Makes no difference with handloads or factory loads.
With factory or handloads with 168-175 gr. bullets, it shoots great
The only mod to the gun is a trigger job to lighten the pull and eliminate the creep.
I had that done by a gunsmith at Rio Salado, where I shoot, and have had no problems with AD.
I used the Berger method to tune the loads and it has paid off. You will know it when you find the sweet spot.