Or, the previous rifle the brass came from had a sloppy chamber, which increased the brass right at the base, where it isn't being sized.
How firmly is the die contacting the shellholder? Could also be the previous gun had a slightly longer headspace.
I'd check brass length first, then headspace/die setting, and then finally the base diameter. It has to be one of those.
Small base dies should not be needed if you have a bolt action with a standard chamber, which is what the Axis is.
For RCBS and have used it on Hornady and Redding also.
First, run the ram to the top of the reloading press stroke with the proper shell holder installed. Second, screw the resizing die into the press until it stops against the elevated shell holder. Third, all play must be removed from the system.
To do this, lower the ram and turn the die 1/8 to 1/4 turn farther into the press. Check the adjustment by returning the shell holder to the top of its stroke--you should feel the press cam over center. Now set the large lock ring and your die is adjusted to properly full length resize cases.
