Quote History Quoted:
I have never heard of this... and I have attended the Factory Armorer course a number of times.
I have seen more +2 magazines in use as a professional Firearms Instructor/Range master over a 30 year career than I can count.
I see no harm in using the longer springs... I also see no necessity in using them (unless the magazines have seen heavy use, a spring change is not needed)
# Do you have a source to link that Glock recommends the longer springs with the +2?
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I believe it was on Glocks website under the magazine springs on the team glock store. This is from Big Tex Outdoors and I don't know who wrote it:
"GLOCK Magazine Spring; 9mm, 10mm, .357, .40, .45 Auto (10-coil)
G17, G18, G34: all 17-rd mags, incl. pre-ban, LE-marked & current unmarked (std 10-coil spring)
G20: for all 15-rd mags, incl. pre-ban, LE-marked, and current unmarked
G21: use only in pre-ban, older LE-marked mags with 3955 follower & 10-rd mags
G22 through G35: pre-ban mags & older LE-marked mags (do not use with Tac-Lights)
We recommend this spring as an extra power mag spring for 15 round, 9mm mags and 13 round .40 and .357 magazines that are using the GLOCK +2."
With that being said my G19 +2's with 10 coil springs are extremely hard to get the 17th round in, 16 is good to go, 17 really tight if I can get it in.