I went with a Manners EH6. Defiance is a Rem700 clone. It fits in stocks that are inlet for Rem700. This is my second Defiance action (my other is a Deviant) and I ordered stocks meant for Rem700 clones and have not had any issues. If there is any tweaking that needs to be done, my smith handles that when he is doing the bedding, but he has never mentioned needing to do anything crazy (he did have to slightly open the bolt handle recess on the Manners EH1 I used for the Deviant because the bolt handle was a touch wider than a standard Rem action).What stock did you go with? Have you mic'd the action to see if it is in fact not rem dimensions?