So I was reading an article over on the Rifleman's Journal, where an experiment was performed that examined order of sizing operations versus concentricity readings.
The findings showed that sizing a case by taking the neck down in two steps first sizing with a bushing neck die then sizing with a 2nd full length bushing die, with a smaller bushing and bumping the shoulder produced more concentric rounds than vice-versa (bumping/preliminary necksize first then neck die) at least for unturned necks.
For this approach both passes through the different dies worked the neck, and the 2nd pass also bumped the shoulder.
Does anyone know if this holds true if you are necksizing with a Lee collet die and then bumping with a redding body die. In this case the two sizing operations are completely independent. I do this the other way around bump first and then neck size but am now thinking it might be worth swopping...
The findings showed that sizing a case by taking the neck down in two steps first sizing with a bushing neck die then sizing with a 2nd full length bushing die, with a smaller bushing and bumping the shoulder produced more concentric rounds than vice-versa (bumping/preliminary necksize first then neck die) at least for unturned necks.
For this approach both passes through the different dies worked the neck, and the 2nd pass also bumped the shoulder.
Does anyone know if this holds true if you are necksizing with a Lee collet die and then bumping with a redding body die. In this case the two sizing operations are completely independent. I do this the other way around bump first and then neck size but am now thinking it might be worth swopping...
