The 22" barreled Krag I bought a month or so ago won't feed.  I can only get four rounds into the magazine and they just sit there.  I shoot it by single loading--have to make sure the bolt is fully rearward and the cartridge rim is engaged by the extractor.  The gun shoots well and I really have no need for its repeating capability but it would nice if it would feed.  Does this sound like an (economically) fixable problem?

Even with the magazine cutoff engaged, you should still be able to get 5 in the magazine with the gate closed.  Perhaps there is something blocking the feed ramp or side plate...  Is your magazine follower spring ok?  That could also cause problems with feed by not pushing the first round all the way around to the feed channel.  Just a though....

45ACPete:  The easiest 'quick check' is to take the side-plate off the left side of your receiver (with magazine empty).  You will likely have to remove the barreled-action from the stock (to avoid wood damage) to remove the side-plate.  After doing this, you should see the carrier/follower assembly projecting through the side-plate opening.  Leave the Magazine Gate (door) closed and press the follower inward to test its movement and action.  With moderate spring resistance it should allow you to push the follower all the way across the receiver so that it 'folds' into the hollow of the magazine gate.  If you can not do this, something is wrong with the Gate, Hinge Bar (pin), Magazine Spring, or Carrier-Follower parts OR Assembly.  While the Side-Plate is removed, you can also view and test the action of the Magazine Cutoff and inspect the Side-Plate for damage.  Psteinmayer was correct when he pointed out that five cartridges should fit in the magazine even if the Cutoff is blocking cartridges feeding to the bolt.  (I suspect that the front tip of your Magazine Spring may be in the wrong position and is blocking the Carrier/Follower's movement).

Thanks for the help, guys.  I did take the barreled action out of the stock and removed the side plate.  Everything seems to be fine.  Tried it again with 5 cartridges--now the first cartridge will feed but not the other four.  Do you suppose I have them  (the bullets-Lyman 311284) loaded out too long?  The OAL of the cartridge is 3.185.  And for the life of me I cannot see that the magazine cutoff has any effect in either position.  If I insert the round into the chamber the extractor will not engage--as I said in my original post I have to make sure the bolt is all the way back--the pin on top of the extractor in the groove at the rear of the receiver--and then make sure that the cartridge rim is under the  extractor hook before chambering the round.

With the sideplate removed (as in illustration above) you should be able to see and feel the cutoff - unless it is either the wrong one, or the shaft is broken. With everything in good order, it definitely will block the cartridge column when engaged, and allow it to pass when released.

Once again--thanks for all the help.  I feel a bit stupid to report that now all seems well with the extractor.  It does  engage the cartridge rim and extract the shell just fine--don't ask me what I was doing at first.  Once I load up some dummy rounds of the proper OAL maybe my feeding problem will disappear too.