Question about Nisha and magnificent six vs luck cannon

Hello everyone.
I want to try another character (currently Wilhem lv 70 UVHM), probably Nisha.
I want to know about the magnificent six skill. Cause I want to know if the luck cannon will get the effect from this action skill because it always is below the six bullet limit, if I spec into the skill that adds 3 bullets, the luck cannon will have 4. But not sure if the minimum of bullets should be six, or seven, so when it reach the ‘final six’, the skill start.
Sorry for my English. I hope I made myself clear.
Thanks in advance.

Yes, it will. If you have a Jakobs shotgun with say, 5 bullets, it will always be active. Same with the Luck Cannon.