Test 1: Basic Functionality
520 rounds fired: Magazine #1 270 rounds fired, Magazine #2 250 rounds fired.
Round 1: (16 Jun) 140 rounds: 70/magazine mixed semi and FA. No malfunctions noted.
In my first round of range tests I started by taking the magazines out of their factory bags and loading them on the range.
Round 2: (Wed 23 Jun) 180 rounds: 90/magazine mixed semi and FA/Burst:1 Malfunction.
The magazines were not kept loaded in between tests 1 and 2.
Today’s observations: I noticed during testing that the magazines did not seem to feed as smooth as with other types I use (Bakelite and steel).
Malfunction Noted: Double feed with magazine #1 around 5th shot, semi-auto: Due to magazine.
Wed 23 June: Loaded magazines. Will put out in the sun all day tomorrow and Friday until Friday’s shoot later in the day.
Thurs 24 June put loaded magazines in sun at 0900hrs temps got into low 120s f (My thermometer stops at 120 f) no direct sun today as sun was obscured by dust; removed them at 0055hrs (mid to low 90s f); magazines felt slightly warmer than outside temp. put in my room with AC (70-75f).
Round 3: (Fri 25 Jun) 140 rounds: 80/magazine #1 60/magazine #2- semi and burst. No malfunctions
Put magazines in sun at 0830hrs temps got into low to mid 120s f- no direct sun today as sun was partially obscured by dust.
Today’s observations: I also fired with a Bakelite and a steel magazine today to see what my perceived difference was from Wednesdays test- The US palm did not feel quite as smooth as the other two, and I noticed a slight drag during burst fire- Now does that really make any difference? It is probably just different cartridge stripping resistance due to the slight gumminess of the plastic design vs. the steel feed lips on others or higher spring pressure of the US Palm- But like I said above in my first post above probably not enough of a difference to matter.
Notes: Magazines reloaded today and allowed to sit until next round.
Sat 26 June Magazines sat in pouch today inside a black tough box in direct sunlight with 125+f temps for 5+hrs. I also took loaded magazines on a 1.5hr chopper trip today in a CH47.
Round 4: (Sun 27 Jun) 60 Rounds fired: 30/magazine- semi and burst. No malfunctions.
Today’s observations: Nothing new, same as before.
End of Test 1
Notes: I have made it a point not to drop empty magazines as I sometimes do during training or doing magazine change drills-the kid gloves come off now.
Edited for clarity