Brian... I've been a competitive USPSA style shooter for over 35 years, and yes, springs in general will take a set...but... I've been using the Glock platform since 2005(through about 4 generations of magazines) and never had a feed related problem with a full magazine... that being said I change out mag springs about every 3 years, and empty the mags between matches....to help alleviate excessive torsional fatigue, I do not follow this routine with my carry magazines...I do not routinely load and unload my carry magazines when I practice with the G43, but rather use a dedicated magazine after the original trial period with the new pistol is successful (minimum 300 hardball and 200 hand load JHP with same bullet style as that carried, with the carry magazine and reload)....

not to second guess the gentleman, I think I would load a couple of solids for the first couple of shots...