Went to the range today. Still having problems. Long story, short, I've narrowed it down to 3 out of my 8 magazines. With these 3 mags, Federal HST's are hitting the bottom of the feed ramp ONLY when the mags are about 1/2 empty or less. Full mags start out fine and once I get down to about the last 1/2 of the rounds is when the problem occurs.
My other 5 mags are fine from the 1st round to the 17th. And FMJ rounds are fine, too. No issues with them.

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