gunnut
Benchrest Competetion
My question is. When using Redding full length bushing die for an ar15 The die only sizes the top 2/3 of the neck. Will this form a donut on the inside of the neck. My understanding of the donut is it will affect the burn rate which will affect shot group. If a donut does form will re-sizing with RCBS comp die remove the donut? I have beem loading for my ar whch has a Kreiger upper for 2 years My best group to date is a .177 average is .450 to .500
Russell
Russell