By Liberty Model do you mean it was built in 1976? Proud owner of one in 4 5/8's myself
I had the same problem with my Vaquero. It's a simple fix. Remove the cylinder pin and deepen the groove with a small round file. A 5/32 chainsaw file worked for me and it doesn't take a whole lot of filing to get the desired results. PathfinderCylinder pin backs out after a few rounds (in spite of a heavier spring)
Working this weekend, CowTowner?
Thats a good lookin boolit! Nice deer too!