I recently put together a Bighorn/Criterion in 20 Practical. I'm using once fired Rem brass I had previously sized for an AR and trimmed on a Giraud. I can size them in one pass using a .228 bushing and no expander ball (necks measure .230 with seated bullet) and all is well. When I resize the brass with the .228 bushing there is no longer adequate neck tension and the bullet will fall in the case. Same with a .227 bushing.
So, I annealed all the cases and now, there is so much neck tension when I neck them down with the .228 bushing I have to pull an expander ball through it so it doesn't crush a ring with the seater. Necks measure .228 with a seated bullet now.
After the first firing with the annealed brass, sizing with a .227 bushing has barely any tension. Makes sense as it's only one thou.
Anyone else run into this?
So, I annealed all the cases and now, there is so much neck tension when I neck them down with the .228 bushing I have to pull an expander ball through it so it doesn't crush a ring with the seater. Necks measure .228 with a seated bullet now.
After the first firing with the annealed brass, sizing with a .227 bushing has barely any tension. Makes sense as it's only one thou.
Anyone else run into this?