What I am about to tell you will probably be unpopular but If it is your desire to use the bottom metal (not to mention the stock) of a 4.4 action space. You need to fill the 4.27 screw hole and redrill and tap for the correct spacing. That is what I would do anyway. The only other solution is the old Wyatt/SSS bottom metal and mags. They did not come in SS and are next to impossible to find...unless your me and have one with both 10rd and 5 round mags.
The former could be done by taking a stainless screw and red threadlock it in flush on the id and using a transfer punch mark the action with the rear screw snug. The drilling and taping needs to be done in a machine that would allow you to get the action set up properly. It could be done in a drill press but you need to know what your doing.
I just remembered that CDI makes a staggerfeed version and you may just be able to drill or elongate the front hole. Maybe someone else will chime in with more better experience with cdi.
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