What OAL for a 6.5 Creedmoor in a AR10 platform wit 140 Berger rounds?

[SDTA]

I was not able to get the 140 Bergers to feed through my mag. The rounds with 140 Hornady Amax rounds fed fine. Any ideas? Its very possible its the magazine. I was not able to find any Magpul mags so I had to use steel. Any help would be appreciated.

Thank you