Originally Posted by
Don Sr.
I just bought the gun and I have 40 .221 just need to know the best way to form them.
Run them through a full length sizing die and then trim 1/1000th off the brass. Clean up the case mouths. Install primer and load with a minimum starting load and the cheapest 7mm bullet you can find (I use blems) and then take it to the range and fireform them to you chamber. Check length with caliper to be sure your case length is still good and then all you have to do is neck size to work up accurate loads.