I just ordered my first box of lead-free bullets to try (Hornady Superformance GMX). My question for those who have used them relates to grouping. I have read that gilding metal bullets group best when they ride on lands that have been fouled only by gilding metal. That is, if you shoot them through a barrel that has been shooting regular bullets your groups will start out pretty bad and only tighten up after half dozen or so gilding metal bullets have built up a new layer of fouling.
Therefore, it is best to start shooting lead-free bullets on a freshly cleaned barrel and then stick with those rather than go back and forth.
Does anyone have any experience which would either corroborate or refute those claims.
Therefore, it is best to start shooting lead-free bullets on a freshly cleaned barrel and then stick with those rather than go back and forth.
Does anyone have any experience which would either corroborate or refute those claims.