By FTF do you mean Failure to Feed or Failure to Fire?

If factory rounds shoot fine I dare say the problem is with your reloads and not the gun. Almost all semi-autos will put scratches and dings on the brass during firing to some extent.

What dies are you using and how are they set up?

Just re-read your first post. Folks seem to have luck doing it but I don't like to load bottle neck rifle on a progressive press. I think flexing/play often keep a case from being fully re-sized and bumping the shoulder back. Try sizing some cases in a single stage press. Make sure the die is adjusted down enough that the shell holder makes contact with the die while sizing. I assume you are trimming the cases.

IMR 4064 is a great powder for .308 and should run in a semi-auto rifle. My M&P 10 ran just fine with re-loads.

Good luck.

__________________
Cliff
CCSO, FPD ret, USN ret.