My 6.5 Grendel is my go-to rifle (carbine) for GP night use on my ranch, as it wears my only night scope. It's accurate and reliable as far out as I need, which with a decent moon is about 400 yards. I use C Products 6.5 magazines with the blue followers as shown in previous posts, and have had no issues with them. You used to be able to get followers and springs from C Products and use them in 30 round mag bodies, but since C Products became C Products Defense I haven't seen this as an option.