There's all kinds of monkey business with this magazine. It binds up alot, but very subtly. The cartridges do not have even and consistent upward pressure due to the binding, sometimes falling below the line where the bolt could even pick them up.
There's precious little material holding them in as well, and with the normal monkeying required to get the damn things to feed, it dumps two in front of the bolt often.
So this will be hard to explain, but as the cartridge moves forward it hits a tit on the magazine that causes it to rise and align. The problem is, when it comes to the space in front of the rim of the cartridge, that void between the rim and case body, that causes it to go off kilter and jam up against the side of the receiver rather than remain in alignment. There's just not enough surface area of the magazine contacting a cartridge when all it's touching is the rim and it's still not started into the chamber yet.
Basically, this action is too long for the 222. The magazine won't support the cartridge long enough to ensure alignment. Said another way, the cartridge is still too far from the chamber by the time it leaves the magazine to ensure chambering. It's a long action rifle made for a short action cartridge with a sheitty magazine design.
