Sticky bolt question

[Jrb572]

I used a same load on my new AT I used on my AW. It's 42.2 of imr 8208xbr. About every ten rounds it has a sticky bolt. No primer or ejector issues. But it is the same on my factory barrel or my bartlein. Is it a problem? I shot the load in the AW in 100 degree weather with no issue. Any help is appreciated.

 

[Darkside-Six]

Could it be that some of your cases have been fired enough times that the case is starting to expand a little?


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[Steel head]

Could it be that some of your cases have been fired enough times that the case is starting to expand a little?


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Kinda my thinking, neck sized?

After 5-6 loadings I get a slightly sticky bolt on a few cases in a lot in my 260.

 

[Darkside-Six]

Kinda my thinking, neck sized?

After 5-6 loadings I get a slightly sticky bolt on a few cases in a lot in my 260.

Yeah, if you're only neck sizing then the base of the casing is expanding and making it stiff.


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[Steel head]

More info is needed.

 

[Jrb572]

It's a 308. I full length size and trim every time. There on there fourth reload. I use I think its a layman case gauge to setup the dies.

 

[KYpatriot]

Do you grease the lugs at all? And how sticky are you talking, just a little more than usual drag or do you have to hit the bolt with your palm to turn it?

 

[Jrb572]

Just a touch of oil behind each lug. Bolt goes up fine. It jambs at the top and takes pressure to move the bolt back

 

[roscoe69]

could be left over case lube on cases, heats up and then sticks case.

 

[Darkside-Six]

Just a touch of oil behind each lug. Bolt goes up fine. It jambs at the top and takes pressure to move the bolt back

I had the same problem. The base of your cases are too expanded. Even if you full length resize. Get a Redding small base die and it should solve your issue.


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[Jrb572]

I will take a look into that

 

[Jrb572]

Is there a better option than using a body or small base die?

 

[Steel head]

Is there a better option than using a body or small base die?

How far are you bumping the shoulder.
I really doubt a SB die is needed.
Could be a few cases that need annealing, they don't size the same when they start to harden and a few might be getting cranky.
A minor die adjustment might be all that is needed.

 

[Jrb572]

According to the Lyman gauge it averages out to 0.0200 I am bumping the shoulder back to make it fit the case guage perfectly. I am using a reeding fl die with bushing. I'm using Winchester brass