Just dragged this up way back from page 26 as it's just started happening to me. Did anyone come up with a fix yet?
I've got the same exact issue, it's a ruger pc carbine thing. I plan on buying a Mcarbo spring that's 15% stronger to hopefully keep the bolt from shifting it's weight and causing the bolt to move off the bolt hold open. It's like the spring is too weak, and the bolt hold open lever thing you press in has a spring in it that's too strong and both work together to make for an almost pointless bolt hold open.



















































