Originally Posted by 303lithgow
To get 25 round magazines to work proper the planets all need to be in alignment.
Yeah, the BC's can be rather moody. Normally it's the Hot Lips (plastics) that get the complaints while the steel lips perform much better. While this isn't your experience there could be the slightest burr on the metal lips or it just might need a little break in. Usually it's the follower that presents the problems. Make sure the ammo is in a feeding angle and not flat.
You shouldn't have to keep them loaded to tweak the tension but if all else fails it can't hurt.