Olin is now running the LC plant, so will not be seeing any more Fed ammo coming out if it for at least another 10 years (until Olin's contract is up).

On the other side of the coin, militarty primers out the LC plant ammo are slightly harder than commercial primers, so not going to solve the problem when Olin starts to push white box out of the plant instead.


Down and dirty, its semi the reduced tension hammer spring, but kind of an old problem when lightened speed hammers became the rage and had the same problem as well.

So using a caliper tail for measurement, measure the amount that the firing pin tip will protrude out of the bolt face when it stop collar is pushed all the way tight against the tail with both in hand.  We are looking for .028" to .032", with the later the better.


So first measurement is the bolt face to bolt recess face as the base line, then next is bolt face to tip of protruded pin, subtract the two from each other, and this gives you the protrusion of the firing pin out the face of the bolt.

Now break out some 400 sand paper on your thumb and with the FP removed, roll sand the  edge tail of the Bolt against the sandpaper, to  makes sure that the tail back edge channel of the bolt is bur-less and slightly rounded to start with.  In most cases if the channel tail has burs, this will give you a thousands or two more protruding of the Firing pin out the face of the bolt.

Next step if your not close to the .032" protrusion, check the tail of the FP in a drill, and using a small jeweler file, going to spin file the face of the stop collar where it seats against the face of the bolt tale to face it back the needed last thousands of a inch or two; to allow the FP to have the full .032" of protrusion.  

Now if this is the FCG that you are going to use in the rifle full time with it lighter hammer spring, and since we are dealing with a harder military primers, not out of the question to take the protrusion to say .034".  The firing pin will be allowed to protrude deep enough for a clean ignition on the military primers with the lighter tension hammer spring, while still not enough to start to pierce the softer commercial rifle primers.

If at some point you decide that your going back to a stronger hammer spring, then just chuck the FP tail back up in the drill, and this time with some 400 sandpaper on your thumb, reduce the tip the needed amount (while rounding it), to get back to the .032" protrusion.
Note, this trick of setting the stop collar back, and then reworking the tip, is a good way to clean up a Firing pin tip, but you only get a few shots at it, since at some point, the step up section of the tip is going to make contact with the FP channel hole in the bolt face, and will not allow any more protrusion of the FP (unless it reduced as well).