Brian yes spot on with that observation.

John, Don't start me off. I regret selling mine last year, it was a real pain in competitions. Straight pulling anything, when the barrel gets hot you are going to get stoppages, on extraction, which was the issue with mine even on GGG, which was supposed to be the solution.
Yes it was great for the first 7 rounds, but therafter, fitted with the original cocking handle, (not the big landrover starting handle version) the only solution was to stand it on its butt and really force the cocking handle backwards as hard as you could, with both hands or a rubber mallet!!

I know there will be those on here who have had no problems at all on a 20 round mag, but it is an issue on the size of the neck and how that was reamed out by the "convertor" IMHO.