Mike,
Maybe the Lake City ammo was a bit hot for the Ruger.

My friend worked up a load for the Ruger and carbine using H-110 which was the powder designed for that round,using the Speer 100 half jacket lead bullet.

It functioned well in the carbine and,of course,in the Ruger.

Being that the powder was designed for the carbine bbl,muzzle flash from the Ruger was a bit...............interesting.

Wayne