3d print 22-250 bore guide

[fangler]

I don’t suppose any helpful person could point me in the direction of a 22-250 3d print bore guide file? Found one that looks great but it’s come out too large to fit in the breach on my Tikka lsa (it may be me being a complete ludite, and I’ll have to get my son to do it!).

 

[Otis]

Are you using Cura as you slicer ?
if so the second box down on the left ids the "Scale" setting. try reducing it to 95% and try again