General Categories > General Firearm Discussion
Let's build a bolt gun :)
20nickels:
I don't own a bolt action, rarely shoot them and I know little about them so what do I do? I go out and buy a completely stripped Mosin Nagant reciever and a 7.62X54r chambered and threaded fat barrel for the intention of building a "benchrest" gun from the ground up. :laugh: When It's all said and done I really won't save money over the standard Remchesterby's but my family and I will be able to shoot cheap com-bloc surplus ammo all day without breaking the bank. Parts so far;
-Stripped Mosin rec. Bought it this way, no history was harmed in the making of this thread.
-Czech UK59 chrome lined machine gun barrel. Don't laugh, kitchen table gunsmiths are getting 1/2 moa out of these with handloads. Some how a batch of these tubes were screwed up before they drilled for the gas port so they threaded them for the Mosin rec's to try and make some of there $$ back.
-Mosin Bolt complete, off Gunbroker.
-Timney trigger pack- light adjustable and crisp, awesome trigger.
-Okie coin style headspace guages. Go, No go, and Field.
20nickels:
First things first. I need to time, torque and headspace the barrel. 54r is a rimmed cartridge so I turned the rim off of one loaded cartridge to see just how sloppy the chamber is. The rimless cartidge sinks .020 deeper into the chamber which brings me to my 1st question;
Should I file the face of the chamber down a bit so it is a tighter chamber or leave it? Thought maybe it would be easier on my brass, not stretching the cases as much. What do you all think?
20nickels:
Question two;
How do you Torque a barrel? Once it is hand tight do you crush it in a bit? Parts of this barrel are way over sized, it weighs 6 1/2 lbs, so I don't mind wrenching on it as it will be turned down to about 7/8" anyway. I have an appointment with a lathe this Sat. the 3rd so I would like to make sure this is the barrel for this receiver before I have the work done. The rec. threads are .940 FWIW. I will have to guesstimate how much the "torqueing" will clock the extractor cut from hand tight.
20nickels:
In case you all were dying to know ::) I've had all my questions answered. I cancelled my lathework appointment and will pick it back up down the road sometime, no hurry. I'm going to face the chamber down about .010, headspace and then re-cut the extractor.
bkoenig:
I missed this the first time around. Are you going to turn the barrel down? Those old machine gun barrels are massive.
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