I think it's been mentioned elsewhere, but let me say again here from perspective of personal experience: with my 15-round magazines, there seems to be a correlation between "nose down jams" and the orientation of cartridge noses in the mag.
Look at the photo. While case heads are obviously single-stacked, the bullets alternate left-right-left in the column. My experience is that, if two or more bullets aren't alternating as shown, there is an excellent chance that a bullet nose will fail to "pop up" into the requisite nose-high attitude as shown in the Vudoo
video, oftentimes even when the video's "attitude correcting" measures are taken.
I don't have a sufficient verified sample size yet to say the alternating-bullet-attitude thing is a sure&certain cause of failure to feed reminiscent of rim lock. But pay attention; we'll see.
(And yep, that's CCI SV ammo in there... I didn't wanna get Lapua bacon grease on my fingers for this learned post
...)
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