First off, all rifles will have their preferences of course.
But in view of your experience so far, I wonder how long a throat that rifle has.
It could be the lighter weight bullets ( which are shorter ) have to jump
a considerable distance when fired. If this is so, it might make it more
difficult to find an accurate load with lighter weight bullets.
I had a Remington Model 700 in .375 some years ago.
I found an accurate load for the 235 grain Speer bullet, but that was
a reduced load that about duplicated a .38-55.
So, that won't help much here.
I never looked for a full power load for the 235 grain bullet, always used 270 / 300 grain bullets
on hogs.
My point here is the Remington no doubt had a different throat length compared to your Sako.