The 1900 is a great rifle. It's capable of handling pressures much higher than those in the milsurp actions.
The bolt travel on them is smooth as oiled glass and the triggers are good from the factory
Adjusting the trigger on a Model 1900 Husqvarna usually isn't necessary as they come from the factory with a 3.5 pound pull.
If I remember correctly, the 1900 action is very slender, right along the lines of the Kimber 84L.
Those rifles were made back in the early sixties and at the time, were considered one of the better hunting rifles available. Many pundits, at the range, liked it better than the model 70 Winchesters.
You might want to take that bolt apart and clean it, as they came from the factory with a lot of grease and most owners didn't bother to clean them out and lube with a lighter oil. The last one I looked at, the grease had hardened up, causing light strikes.
I've owned a couple of them, and liked them a lot. My last 1900 was chambered for the 6.5x55swede as well.
They're very well made rifles. Some people turn their noses up at them now, but they're accurate and easy to carry. Maybe they just don't like the classic look of wood??? Maybe they don't like that it isn't controlled round feed?
Some of the rifles I've seen recently have been shot a lot and the throats are badly eroded. If the throats and bores are in exc condition, they compare well to even some of the higher end rifles today in fit, dependability and accuracy.
Taking apart the bolt and reassembling it can be tricky. There should be vids on YouTube.