A slightly different question. My AR10 Armalite Target action takes a lot of effort to charge the first round. It is lubed well and throws the spent rounds at 2-3 o'clock. I have to place the rifle butt on my knee or against my belly and it takes a lot of force to pull the bolt back. It cannot be charged by holding the rifle in one hand and pulling the charge handle back with the other hand. That action will cause my rifle to swing wildly. I see a lot of videos of guys seemingly easily pulling an AR15 bolt back, not mine. Is this amount of force normal for a 308 AR10? If not, what is required to fix this to make charging less effort.
I just pulled my 308 out. With a fully charged 20 round mag and it's just a two finger easy charging. It seems to me that when I built this thing out of parts that I went to a lighter rifle length spring. It's the buffer weight spring that is resistance to charging. 2-3 means that you are over gassed. I pulled the rear breakdown pin and I can push the buffer weight down with one finger.