How to improve heavy bolt lift?

[Alex Wheeler]

Have you checked into Kelblys adjustable trigger hanger to time the trigger, In which it will relieve bolt lift. your may have to play go to bullet central.com or you tube to see how it works. I am not an expert but this seems like the problem the adjustable trigger hanger might fix or a least help relieve the bolt lift. I just order one as my panda rocks in the bags upon bolt lift also, Tubbs springs are another way to go to, also in my search for better bolt lift and still keeping firing pin working without misfires.

Trigger timing has no effect on open.
Opening is directly related to spring force and angle of the cocking ramp. The rest comes down to friction.

 

[M14AMU]

I have actually seen one fellow I know use this:

RMB200 by Sharps Man, on Flickr

 

[Tim Singleton]

I have a couple pandas one bat and a hall. The bat with the roller cocking piece has a noticeably easier bolt lift. One of the pandas shoots circles around all the rest.
The important thing is how well it shoots. If it doesn't move it on

 

[carlsbad]

It just takes some force to cock the spring. Not much you can do about that unless the cocking ramp is damaged (not likely).

One thing you can check is the threads that the bolt shroud screws into the bolt actually turn while cocking. You don't want to lube your spring and people get focused on this and don't lubricate the shroud threads.

I've had to put heavier firing pin springs in some high end actions lately. It seems that the more people pay for an action, the lighter they want bolt lift. So mfgrs use as light a spring as they can get away with. As a result, trying to fire hard military primers or other difficult rounds some have experienced FTF. This is one other advantage of bushing your firing pin down to as small as possible, it takes less force to dent the primer. Your firing pin is already .067 and going to .060 won't help much. But you can probably get by with a lighter spring. Worth a try.

You can work on your technique--put your thumb on top of the stock to hold it down while you raise the bolt with your fingers.

It might help to put a longer knob on the bolt...I know, blasphemy. A longer bolt won't lower the torque required to raise the bolt but the longer lever will make the force you have to put on it less. Might make it easier for you to do while keeping the rifle steady. Might not help.

--Jerry

 

[carlsbad]

I have actually seen one fellow I know use this:

That would be the guy who posts the handle broken off the bolt on Monday morning with the story, "Just broke off while cycling. Defective piece of crap."

 

[Tim Singleton]

One of the other action I have that has a really smooth easy bolt lift. Fails to extract in the upper load. The pandas have never failed on primary extraction. When you have a stuck case on the firing line 2 shots on the record target and time running out. That easy bolt lift with its shallow primary extraction ramp doesn't count for much