Just in case I´m not the only one: Sako tells us the twist rate is 1/12". I have a stock rifle right here with a 1/10" barrel. I don´t know what to think except that this is a positive surprise, just about to try 300 MK:s on this one. Got everything except the bullets,they are crossing the pond at the moment. The TRG-42 obviously has a 1/12" barrel... I found the site below and checked my TRG-S barrel tonight for fun... 1/10". Very funny indeed,I have only shot factory Scenars for several months, thinking this is a 1/12". Shoots them good but now I´m even more interested in trying 300 MK:s. Moose,you see. Rifle Twist Rates Never trusted manuals anyway lol.