Figure 76 shows the complete barrel, receiver and action assembly of a Springfield without the stock. Study it. Set it up on the bench in front of you and familiarize yourself with every curve in the receiver formation. Note carefully the concave and convex surfaces—remembering that wherever a portion of th* metal has been hollowed, the wond of the stock at that point will be rounded out to fill it. In inlerting the stock you are simply carving out a reverse
impression of the metal parts of the gun. The barrel and receiver may be regarded as the positive, while the stock is the negative of the complete arm.
Now study, tery carefully. Figures 77 and 78. In Figure 77, A shows the action mortices on a Springfield service stock, cut out on a routing machine in a few minutes. B shows a stock blank inieited for rhe same action by hand, requiring several hours careful labor. Note particularly the difference in the two from end of tang to rear of magazine mortice. In the machine-made stock contours are limited to the scope of a revolving cutter, while in the hand made job, there are no limitations. Only the wood actually displaced by the steel is removed, thereby greatly increasing the strength, and also helping to absorb vibrations when the gun is fired. Note particularly the extra wood left at "a" in B, Figure 77. This fills up the hollows cut underneath the targ on either side. Note also the cuts "b" and "c" in B, Figure 77. These fir into the portion under rear of receiver which holds the trigger mechanism. Note the difference in method of bedding the rear of tang in the two stocks, the hard-fitted job supporting the metal at all points, while only two or three essential points are supported by wood in the service stock.
ing is at the recoil lug and rear of tang—two points of support against recoil compared with seven.
Now study Figure 78. This shows a sectional view of the two stocks, one inletted by hand, the other on a routing machine. The difference in the amount of wood left in the stock at its weakest points shows very clearly, indicating the extra margin of strength to be expected of a hand made stock. Now set your barrel and receiver in the machine made stock. Probably 3'ou will hnd that you can move it backward and forward from 1/32 to 1/16 inch. This tolerance is necessary by reason of the inaccuracy of machine fitting, and the slight variations which occur both in stocks and actions; for in quantity production, any action must fit into any stock.
Set the magazine into position and tighten up the guard screws. Now note that there is clearance back of the rear end of tang of about 1/16 inch—this to make sure that there is nothing to prevent the recoil shoulder on receiver from setting back tight against rhe wood. In our hand fitted stock—assuming that the fitting is properly done, this gap behind the tang is not necessary. For it will be readily
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