I have done plenty of the them.
<br>if doing a 3006 or other LA with a standard bolt face, then the bolt face must be opened and small bit of milling must be done in the action to widen it. it is fine length wise.
<br>If it is to be done on a LA with a magnum bolt face, then only the mag box must be changed.
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<br>There is a small differerance in the width of the opening into the action. The bolt rails are a few thousanths wider on the non magnum action VS a new 700 from the factory chambered in the RUM offerings. I mic'd them and now do a very little mill work on them to make them the same. I reallt dont know if it is neccesary, but I figure why not make em the same.
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<br>Celt