The problem with having your "fix" based on where you load the rounds is the fact that they do not have to stay there- especially on a rifle that could be handled rough in hunting situations. Under recoil the rounds are going to want to move forward.

Another problem is that many different things could be causing the problem- and while there's many people here who could help you out if they could see the actual issue- it is just a shot in the dark without knowing what's happening. If the bolt can pass over the next round then the obvious issue is that it needs to be presented up higher. That could be the ramps are holding it too low... not enough spring pressure... or the follower is binding and not moving to the top. If you are using round nose ammo you could try a more modern bullet (hunting HP or tipped) and see if that helps because they usually have a longer OAL.