I have 3 X7 variations (XL7-30/06, XS7/7-08, and X7VH/223). I've experienced what you're saying in the XL7 if I'm not careful in loading by feel (early morning, minimum light). After many loading, I'm used to its nuances by loading it slightly forward and sliding the ammo backward till it stops.
I don't have the problem with the short action calibers though. Which caliber are you having problem with?