Arei,

Did you buy the rifle new or used?

From the description it looks like you have a new centerfeed action. However the action screw spacing on the centerfeeed action should be 4.40".

The old first generation short actions had 4.52" spacing, but they stopped being made quite some time ago. Most of the short actions we see nowadays are either 4.400" (centerfeed, the newest design) or 4.275" (staggered feed).

I'd suggest you double check the screw spacing measurement just to make sure.