CMRHG
Previously Chuck Moles
I goes away when I fire it with a spent case with a primer.
Bolt bounce and Scope shift when dry firing
- Thread starter CMRHG
- Start date
Help Support Long Range Hunting Forum
CMRHG
Previously Chuck Moles
And I do believe that it is affecting accuracy. IMO, there's got to be a mechanical reason for it.
ShtrRdy
Well-Known Member
There is a mechanical reason for it. But if you don't see it happen with a fired case chambered then this particular behavior is not likely a problem.
What sort of accuracy problem are you having?
CMRHG
Previously Chuck Moles
The gun shoots 3/8"groups all day long. the groups are always a horizontal line. the groups are pretty consistent from the middle then left of center.
Shadowwalker
Well-Known Member
If this is truly the case, I'd be getting me another scope real fast......
there are several mechanical reasons for bolt bounce. In no particular order they are:
1- firing spring (as previously mentioned) Several good options there.
2- most likely a bolt diameter issue. Keep in mind that when the bolt is placed in battery, there is upward spring pressure from the trigger sear. Any slop or tolerance is pushed up to the rear bridge of the action. upon firing the bolt is allowed to drop down causing the bolt handle to bounce. I generally see when there is several thousands or more of tolerance. i generally go for tight fitting bolts and I don't see this issue.
3- as mentioned you could have a bolt timing issue. If the cocking piece is contacting the cocking ramp on its final journey forward it could cause the bolt to bounce. This is generally something that is way out of whack but can happen.
I may have missed something but I believe there are the big ones. overall, you have a good shooting rifle so it may be a thing to live with??
1- firing spring (as previously mentioned) Several good options there.
2- most likely a bolt diameter issue. Keep in mind that when the bolt is placed in battery, there is upward spring pressure from the trigger sear. Any slop or tolerance is pushed up to the rear bridge of the action. upon firing the bolt is allowed to drop down causing the bolt handle to bounce. I generally see when there is several thousands or more of tolerance. i generally go for tight fitting bolts and I don't see this issue.
3- as mentioned you could have a bolt timing issue. If the cocking piece is contacting the cocking ramp on its final journey forward it could cause the bolt to bounce. This is generally something that is way out of whack but can happen.
I may have missed something but I believe there are the big ones. overall, you have a good shooting rifle so it may be a thing to live with??
Flatbow
Well-Known Member
I have never heard that a scope could take a shot or two to "settle in".
This is good info to have, thanks
3- as mentioned you could have a bolt timing issue. If the cocking piece is contacting the cocking ramp on its final journey forward it could cause the bolt to bounce.
When the bolt is rotated into battery, there is a milled flat/rest that is to contact the right side of the receiver rails. If that flat is too deep, the bolt rotates too far when in battery. This causes a misalignment between the sides of the sear on the cocking piece allowing it to rub/contact the straight side of the bolt cocking ramp when fired . The bolt then jumps into alignment with the cocking piece. Moreover , the rubbing robs some of the power of the striker spring slowin' the striker.
If your heart is beatin' like a rabbit, you want that striker to have all the speed it possesses so you can properly time the primer strike between beats.
Shadowwalker
Well-Known Member
They, if owned by a knowledgeable shooter, are usually are up for sale within the week.
Litrfoot
Well-Known Member
You might check your trigger. Make sure it is not touching the sides or front of the bottom metal! If it is you need to relieve the metal around it.
