ral3 said:
my mark iii hunter (2008 model) when in the de-cocked position is almost impossible to re-cock (i use pliers to reset it) when in the cocked position it has a normal pull - what could cause this? what controls the tension? parts to replace?
thanks for your help
this is a new gun to me and i have never run into this before
I'm sure you know that when pulling the bolt back, we need to over-come the mainspring in the mainspring housing assembly. That's where the resistance is and what pulling the bolt back needs to overcome to cock the sear into the hammer notch.
Mark II pistols are not that hard to cock initially, because the bolt diameter ears are a bit larger and provide more of a purchase to get the sear and hammer engaged. Once the hammer and sear are engaged, there's little resistance to over-come, so it's much easier to pull the bolt back.
Many folks are now using additions attached to the rear end of the Ruger Mark III and Mark IV bolts to ease the pull back involved with the smaller bolt ears. So, don't change, or accept any advice to change, the mainspring housing spring to a lighter version. You are very likely to get light firing pin hits due to the weaker spring.
Check out some of the bolt retract assist parts from Ron Power Custom, he's very professional and makes the parts he sells.