What this does is tension the receiver's bedding. That said, the crack in the stock web may or may not affect the springiness of the stock and its damping effect. Now the Finn M39 does not have a springy steel trigger guard, so it uses the natural elasticity of the birch stock wood to accomplish the same thing. K31 shooters will adjust the tang screw to fine tune the tension on the trigger guard. Folks that also shoot the Swiss K31 rifles know to tension that rifle's action screws in a similar fashion, but with the K31 the stamped steel - and springy - trigger guard is also a harmonic damper. Then fully tighten the tang screw, and after that fully tighten the front action screw. Then tighten the front screw and observe how the barrel lowers back into the stock channel. First, screw down the tang screw until resistance. In conjunction with the "rocking" receiver, the action screw tightening sequence is specific. The Finns shimmed the stock behind the recoil lug to achieve this. With the handguard and bands off, and the magazine and tang screws removed, the action should lie in the stock so that if you press down on the tang, the barrel should rise up a bit from its channel as the receiver rocks longitudinally. I have described previously how the Finn MN actions are bedded. But by the same token some sort of equilibrium may have been reached on your rifle, since the crack appears to go all the way through in my rifle the crack still had room to grow. I repaired my M28/30 because I expected continued firing would extend the crack and eventually break off the web.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |