Depends how much you want per shell. Are they once fired? Does the head stamp say Barrett 416 Barrett-I think these are made by RWS? Are they crimped primers?? Thank you for kind reply. Ernie R. 20 would be fine.
In FLR a shell the expander ball meets resistance when it leaves the neck portion of shell. Aside from dipping the neck of shell in graphite or putting a high polish on expander ball- anyone have a better idea???