A lot of 700's are slightly "short chambered" I have to set my case shoulders back a few thou more to have proper head clearance for mine.
The somewhat harder LC cases WILL chamber harder than most commercial because of this.
I wound up having to dust off .002 from my shellholder, the bolt closes fine now.
I used my surface grinder, but you can use the flat surface/sandpaper trick.
Your cases aren't too long after sizing are they?
OR it could be your die.
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