I’ve been having several misfires with my Meacham 45-90. I’m wondering if anyone has had this problem and how to correct it. 
The main difference between this rifle and an original highwall is the Niedner firing pin and skeletonized hammer. It uses the late style coil hammer spring. 
The spring seems strong and firing pin protrusion is good. Currently I’m using 210M primers but have had misfires with others although I don’t recall any with 150M pistol primers. 
Since this is a target rifle, I’ve given some thought to removing the safety notch and fly, but I’m somewhat reluctant to go down this road unless I’m sure it would cure the problem. 
Any thoughts?