Brushed Firing Pin

[YoteChaser]

Can someone explain the reason why you would Brush the firing pin ?
I have a firing pin that hits the primer very hard and creates a crown that I feel makes the bolt
heavy no matter the powder charge I'm shooting a 22BR
Brush the firing pin was suggested to try to fix the issue...

 

[Toms]

Can someone explain the reason why you would Brush the firing pin ?
I have a firing pin that hits the primer very hard and creates a crown that I feel makes the bolt
heavy no matter the powder charge I'm shooting a 22BR
Brush the firing pin was suggested to try to fix the issue...

You bush the bolt face and use a smaller diameter pin with little clearance around it. The crown you talk is from too much gap around the pin. It's called blanking primer. Hot loads can cause but I never had it happen with a bushed bolt. Toms

 

[Coyotefurharvester]

1. Easier bolt lift
2. Firing pin will be centered on primer
3. No more primer crater, so you can actually use primer appearance to judge pressure.

 

[SSL]

I believe you mean 'bushing' the firing pin? Bushing, as I understand it, provides a closer fit of the pin to the bolt. This helps mitigate the 'cratering' that can occur when there is a substantial gap between the pin and the sides of the hole in the bolt. It will NOT, however, eliminate such cratering due to excessive loads.

 

[YoteChaser]

You bush the bolt face and use a smaller diameter pin with little clearance around it. The crown you talk is from too much gap around the pin. It's called blanking primer. Hot loads can cause but I never had it happen with a bushed bolt. Toms

Thanks Tom

 

[YoteChaser]

1. Easier bolt lift
2. Firing pin will be centered on primer
3. No more primer crater, so you can actually use primer appearance to judge pressure.

Thanks this helps....

 

[YoteChaser]

I believe you mean 'bushing' the firing pin? Bushing, as I understand it, provides a closer fit of the pin to the bolt. This helps mitigate the 'cratering' that can occur when there is a substantial gap between the pin and the sides of the hole in the bolt. It will NOT, however, eliminate such cratering due to excessive loads.

Thanks SSL

 

[swd]

If there’s too much slop around the pin that little crater can get blown out and end up back inside the bolt. It’s called blanking a primer. And if you’re using a Jewel trigger that condition is notorious for breaking a part inside them when the pin gets jammed back. Bushing the bolt/pin has no downside and is relatively cheap $100-$120.

 

[YoteChaser]

If there’s too much slop around the pin that little crater can get blown out and end up back inside the bolt. It’s called blanking a primer. And if you’re using a Jewel trigger that condition is notorious for breaking a part inside them when the pin gets jammed back. Bushing the bolt/pin has no downside and is relatively cheap $100-$120.

Thanks SWD