I just received the recoil calibration pak and the 5% XP mag spring for my
MK9. Wolff recommends starting with the highest load rating and working down until the desired slide operation is obtained. I'm using Speer 124 +p short barrel for SD, what combos (factory 20.5, 22.5 or 24.5) have you guys found works well with the xp mag spring in the MK9?
MK9. Wolff recommends starting with the highest load rating and working down until the desired slide operation is obtained. I'm using Speer 124 +p short barrel for SD, what combos (factory 20.5, 22.5 or 24.5) have you guys found works well with the xp mag spring in the MK9?