This has nothing to do with your Omega, all ML's will do the exact same thing if you try cleaning them after several rounds pushed through. Like mentioned get in a habit of cleaning after each shot when at the range, it will eliminate the stuck rod, decrease your group size and clean up time following your range session.

However may I suggest prior to hunting season you shot a load then push another down and even a third down without cleaning, so you know what to expect when hunting in regards to accuracy. Obviously when in the field you won't have time to patch clean, so IMO it is better to practice like you are hunting and know excatly what needs to be done if it ever arises.[8D] BTW don't try and clean it, remove the breech hot and take it home to do your thorough clean up...just a hint