Problem with ZAN slugs in my FX Crown

I have a loading problem when using ZAN .22 cal 23gr in my FX Crown . It seems that the slugs do'nt stand correctly in the magazine ; they are a bit slanted and the magazine doesn't rotate anymore after 1-2 shots. I have no problem with the FX Hybrid , which are a bit longer than the ZAN ; maybe these are too short and their shape doen't allow to stay "upright" in the magazine.
Did anyone have this kind of problem ?
 
I have a loading problem when using ZAN .22 cal 23gr in my FX Crown . It seems that the slugs do'nt stand correctly in the magazine ; they are a bit slanted and the magazine doesn't rotate anymore after 1-2 shots. I have no problem with the FX Hybrid , which are a bit longer than the ZAN ; maybe these are too short and their shape doen't allow to stay "upright" in the magazine.
Did anyone have this kind of problem ?

I run an eaglevisioncam magazine in my Impact for my Zan slugs and it cycles extremely smooth, just a PITA to get the cover on after loading it.
 
The original FX magazine for my .177 Maverick can not handle heavier slugs ( 16 & 20 grain ) 10 - 12.5 - 13.43 - 15 have not given me any problems.
The same go for heavy pellets like beasts, they also work just fine in the original FX magazine.
So to remedy this i got a CARM slug magazine,,,,, and a single shot tray, the latter i really like and is what i use these days in the Maverick.

The Carm magazine though, it do do something to the feel of the cocking / cycling, but it do work just fine