I am sure this has been asked before so I'm sorry if its a repeat question. I am just curious if ill need a smaller base to hold the case at all or if one used for a .308 would work as well?
The Redding shellholder is #5. The 6.8 SPC is a off shoot of the 30 Remington and that is the only base size that matches the 6.8 SPC. If you have 6.8 cases that work in other shell holders, something is not right. Why ask for problems by using the incorrect tool for the job. Shell holders are cheap.