SHIELD BREAKIN PERIOD

[RobzGuns]

The Shield carries offset stack magazines...not single stack

Be that as it may... The way the shoulders of the mag body are, it still wouldn't allow a true double feed.
Most of us here did the Single-Stack/Stagger-Stack (Offset-Stack) debate a couple Years ago and simply accept that the term Single-Stack is 'Close Enough' for practical purposes.

BTW: the new G43 Single-Stack?? It's an offset stack too, but is also being marketed as a Single-Stack 9mm.

 

[Wishoot]

IMO the Shield doesn't need much, if any, break-in period. Mine has been reliable since day 1 with a variety of ammo and weights.

I'd have an experienced shooter run a few mags. If the problems persist, call S&W and they'll make it right. If the experienced shooter doesn't have any problems, you're doing something wrong.

 

[WSanford]

Been shooting 115 for the past month with no issues.

 

[RobzGuns]

Prefers 124gr? I've had mine for almost 3yrs now and this is the first I've heard of this.