That is part because you have a 22-250 magbox. you need to get a 204/223 magbox and see if that works due to the case size differences between the 22-250 and 204, unless that what your smith ordered for you.
If you do have the 204/223 magbox,follower, and spring you may have to tweak the mag lips a little to see what works best. As with any non-factory round there are always adjustments of some sort to be made.
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