I will be reloading 6.5 Creedmoor Large Primer Lapua brass and have a question regarding primers. Has anyone done testing to see if a FED 215 Mag primer will produce good grouping? After giving this some thought, I‘m wondering if the FED 210 would be a better choice? I’m wondering if the FED 210 primer will yield higher velocity and tighter groups due to the lower pressure. I look forward to any help you can provide.