Anyone only getting light striking issues with a Ruger Mk4 on cold days

Less than 1000 total rounds through the gun, high velocity 22lr, and freshly cleaned gun (I even removed the firing pin for cleaning). When the weather is sub 30 degrees or when the gun is physically cold I get light strikes. After 2 mags when the gun warms up it performs very well. Is the bolt metal somehow contracting and slowing the firing pin down?