When I called in I was told that OAL was not a concern. They claimed that Angus ran his ammo, which is 1.090 and it ran fine.
With my experience i respectfully disagree. My reloaded ammo was at 1.110 and it failed horribly. So I went and bought a 100rd federal pack and it ran flawlessly. It measured at 1.158 so i reloaded 100rds of my own ammo at 1.158-1.160 and it ran absolutely perfect. The only thing I changed was OAL.
In the standard 30rd mags the shorter ammo had no issues at all but as soon as I added the extension then OAL became a big factor, which makes no sense but it is what it is.
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