This is my rifle and it is manufactured in 1945. Please, notice bakelite pistol grip cap and soldered sling swivel in barrel. Front sight is always without sight hood. If you compare serial numbers to yours, these are quite close to each other, but time frame is almost 2 years. This kind of rifles are nowadays quite rare in hunting.
Original Sako 102D soft point bullet is heavy, but equipped with thin wall 0,3...0,35 mm. There was also Sako 103D, weight 10 grams, full metal jacket bullet available, but it discontinued in 1950's (never even seen one).