Used to collect Sako's, but threw them over for my new love, Schultz & Larsens. I now have nine in different calibers. The stocks fit me perfectly and all of mine (and any others I have seen) will shoot honest 1/2" groups at 100 yds with any decent factory ammo such as Norma!!! I have handloaded for 40 yrs but have found it difficult to better good factory ammo in my schultz's. Also have a soft spot for Carl Gustaf's, and Marlin lever guns.
In the 1960s, two of us owned a sport shop. We sold a lot of Schultz and Larson, probably more than any other make. At that time customers often wanted their new rifles sighted in for them and I was the one who did the shooting for them. The Schultz and Larson was the only make that regularily shot properly, right out of the box. We mostly sold 7x61 and 308 Norma magnums. I probably am not as good a shot as you are, but I was happy when every one I shot would make five shot, one inch groups, except when I blew it.
It was always Norma factory loads I used, and yes, I don't see how a hand-loader could improve on them.
However, I am a firm believer that a good, well bedded rifle, will shoot any good ammunition to perfection.
At that time, mid 60s, there was no Canadian distributor for Sako. I wanted one, so I wrote, on our letter head, that I wanted a 270, and I sent it to the Sako factory in Finnland.
They didn't reply to my letter, but within a month the rifle arrived at our post office, along with the bill for me to pay them!
When I took it out to test fire I almost prayed that it shoot OK. But no, after three shots it started to walk the bullets. I do my own bedding, and when I was done it turned out to have all the accuracy it claimed to have been made with.
And no, I never tailor made ammo for it. I just loaded up the cases with Norma 205, and later H4831, to give best velocity without excess pressure, and accuracy was perfect.