The Finnbear was introduced around 1961 and the A3 is the same basic rifle, but there are action differences. Frank De Haas has chapter 26 on the later, upgraded SAKO models in his revised edition of "Bolt Action Rifles". I think I read somewhere that the barrels were hammer forged.
This action was the SAKO action for a very long time. I have an A3 in 30-06, it is a very accurate rifle and a very smooth rifle. I do not consider it inferior to anything, it is a very well built and well thought out hunting rifle.
If I'm not shooting, I'm reloading.