Did some housecleaning in my reloading room today and found 3000 Rio primers I forgot I bought. Any comments on them? I heard they miced out 3 or 4 thousands bigger than 209s. shouldnt be a problem unless it makes the pocket too big to go back to 209s.
I have used the Rio and Cheddite primers both in the Remington unibody hulls,( STS, Gun Club, Nitro,...) with no problems. The European primers will mike out about _002-.003 larger than the American primers. Don't try to use the American primers in the hulls once you have used the European primers in them, fit may be loose. In a single shot or o/u it may not be a problem but in a pump or semi you could wind up with a loose primer in the action.
I also made up a real easy tool to check primer fit in hulls. Take a spent US made primer and epoxy it to a short piece of 1/4 inch doweling. If you can't push the primer in over 2/3's to 3/4's of seating depth you are probably OK.
Since my sources for the Cheddite and Rio's has changed, along with prices, I will probably be using the American primers again once my current supply of Cheddites are gone and I will probably toss the hulls.