I had one happen to me this past Saturday morning. I have an original M1903 Springfield NRA Sporter, exactly as it left the Armory in 1929, which I elected to employ on our deer opener here in MD. At 0'-dark hundred I'm in position in the woods and loaded the rifle with a full magazine, which I had never done the whole time I owned it. (Yeah, I know.) The handloads are within spec for OAL, based on the ammo it was created for to shoot. Yet, 5 in the box caused the magazine follower to bind deep down in there somehow, and I could hear the cartridges rattling unsupported after closing the bolt. Yikes, not what you want a half hour before sunup. With flashlight in hand I sat there pissed-off trying to suss out the problem. I finally gave up after determining that 3 down and one up the spout let it work as it should. No chance yet to determine the cause. Didn't matter, as nothing presented itself to shoot at anyway.
