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? Can I use factory ammunition with my DVC Open and DVC Steel? What is the capacity for STI magazines? What makes the Costa Carry Comp, DVC Open and DVC Steel barrel and compensator superior? Why should I choose STI over other brands? Comments 0 comments Please sign in to leave a comment.