ChrisF,
My experience parallels yours with 4064. I first started using 42.0 grs under 175gr SMK with new IMI brass and quickly dropped it to 41.0 gr.
Never tried the 155 Palma. Shot a lot of Speer 125 TNT at 200yd, I think I gained more with less recoil than the small loss in accuracy hurt.
Too many different barrels, chambers and differences in powder lots to say any one recipe was the "one" for all rifles.
I was not rolling in money so tended to keep things more on the safe side.
I got more mileage loading safe "good enough" loads and lots of them to practice/train as much as possible.
After saying all that, as soon as I legged out I parked the service rifles. My piss poor eyesight was a constant struggle with service sights and I welcomed longer sight radius and way more options that came with the match rifles.
