
Here's some added advice (that's actually on-subject) spend some time with Google learning how bolt action firearms and magazines work.
There's some small, easily overlooked, details that will make or break a box mag.
I.E. feed ramp and feed lips; easy to make, easy to make right, but just because you made them, doesn't mean you made them right...
EDITED to fix spelling error...
...And again for grammar...