please show more pics from your mosin! I love such unusual caliber - rifle combinations.
have learned that this is a very typical postwar style for finish sporting rifles:

A german M 88 action with a barrel in 6,5x54 Kurz Mauser, maybe the last M 88 sporter ever made

a japanese Arisaka action with a 7x57 barrel

wonderful strange rifle's http://www.kerailyase.fi/Uutuudet.php

the Sako L 46 rifle in 7x33

http://www.ace-gun.com/product_details.php?p=1218

think this design looks equally good for hunting and target shooting