Will STI 2011 mags hold any ammunition loaded longer than SAAMI spec of a specific caliber? Rachel Zorn September 18, 2017 16:07 Updated Follow Yes, but the .38 Super and 10mm versions will not accept ammo longer than 1.250″. Related articles What is the recoil spring weight in my gun? What is the capacity for STI magazines? Can I use factory ammunition with my DVC Open and DVC Steel? Will my full sized 2011® magazines fit in the smaller carry models? How do I find a dealer near me? Comments 0 comments Please sign in to leave a comment.