Thread: Adjusting neck resizer?

I usually resize the neck to within 1-1.5mm of the shoulder junction. The neck tension is a fairly important factor, if you want consistent ES etc. I recently did a test with changing the neck tension with my Redding S type bushings. I varied 2 lots of test loads by 0.001" neck tension and on average I attained a 20fps increase with a 0.001" tighter neck and a lower ES. This was on a small cartridge, my 6x45.