Gettin your bolt bushed in Canada

S

Slimbo

CGN Ultra frequent flyer
Rating - 100%
219   0   0
Location
B.C
Looking to run 6.5x47 in a model 7, so I guess I’ll likely need to Bush the bolt hole and turn down the pin for the small rifle primers. GRETAN in the states is not currently accepting work. Anyone know a smith that does this in Canada?
 
Sorry, but you seem to have lost me. Given that you're asking about a large primer firing pin I'm assuming that the caliber it's in now is not a 223 or similar cartridge. A quick check on Gunparts tells me the firing pin for either primer is the same, so unless the firing pin hole is wallowed out, no need to bush.

If the bolt is for a 308 sized cartridge, the bolt face is too big in diameter for a 223 sized case. IIRC some savvy smiths fit a new bolt head, with a Sako extractor. This type of work gets spendy fast. Cheaper to start with a 223 rifle.
 
Slimbo said:
Looking to run 6.5x47 in a model 7, so I guess I’ll likely need to Bush the bolt hole and turn down the pin for the small rifle primers. GRETAN in the states is not currently accepting work. Anyone know a smith that does this in Canada?
Click to expand...

You may want to message Guntech. He is a member here. I am sure he could assist you. I believe he is on your side of the country as well.
 
nitro-express said:
Sorry, but you seem to have lost me. Given that you're asking about a large primer firing pin I'm assuming that the caliber it's in now is not a 223 or similar cartridge. A quick check on Gunparts tells me the firing pin for either primer is the same, so unless the firing pin hole is wallowed out, no need to bush.

If the bolt is for a 308 sized cartridge, the bolt face is too big in diameter for a 223 sized case. IIRC some savvy smiths fit a new bolt head, with a Sako extractor. This type of work gets spendy fast. Cheaper to start with a 223 rifle.
Click to expand...

Bushing the firing pin hole and turning the firing pin tip down is recommended if you want to run higher pressures. I did that with some 6mm BR's and the odd bolt face that had those horrid large holes with a bevel. Bill Leeper has done many. It is an accepted procedure. Just as bumping a bolt is as well.

I am not taking any work for awhile. Just had cataract surgery this morning and will probably take the summer off.
 
guntech said:
Bushing the firing pin hole and turning the firing pin tip down is recommended if you want to run higher pressures. I did that with some 6mm BR's and the odd bolt face that had those horrid large holes with a bevel. Bill Leeper has done many. It is an accepted procedure. Just as bumping a bolt is as well.

I am not taking any work for awhile. Just had cataract surgery this morning and will probably take the summer off.
Click to expand...

Thanks. Always something to learn.
 
OP,
Something to ponder

IF,you elect to bush the breech face & turn the firing pin tip to 1/16" diameter.

The firing pin TIP is now un-supported & will bend/break....eventually.

Bush the breech face to .076"-.077" firing pin for a couple thousandths clearance & you will not have an issue in your life time.
 
Hey Dan, Can you elaborate?
I can understand an issue if the bushing is made too short so that the firing pin “falls out” its rear upon cocking. The remedy to this is to make the bushing long enough that the firing pin never leaves the bushing. This provides more support than it had in its factory configuration. Gretan (I believe) has a video on YouTube demonstrating this with a couple cut away bolts.

If you’re referring to something else I’m all ears.

Paul.
 
You only need to turn the tip of the firing pin - the length of the travel plus a little... and make the bushing accordingly. I used to turn the tip to about 60 thou + to fit a 62 thou hole.
 
You only need to turn the tip of the firing pin - the length of the travel plus a little... and make the bushing accordingly... but I have also just bushed the hole for a better fit and left the tip. The smaller tip will handle higher pressures but it's the fit that is important.
 
leelad,
As per Slimbo's pic-

Is the bushed breech face/.bushing machined to match the turned firing pin.....99% of the time NO.

Resulting in an un-supported firing pin that will BEND or BREAK in short order.

Firing pin tip clearance of a couple thousandths(.002") w/ the std .075" rem firing pin will eliminate primer cup cratering & allow dry firing/shooting enjoyment until hell freezes over.

The .062" pin diameter modification is a marketing scam/money maker for the 'smith as are speed lock firing pins in a Rem platform.

I do not replace broken/bent.062" pins for customers since they need to contact the 'smith who accomplished the task & reach for their wallet again to learn from the bastardization.
 
Are you saying people are turning a firing pin down to ~.060” but bushing bolt to .075”? That would most definitely cause all sorts of problems! What guntech and I are saying is:
-yes firing pin fit is king.
-a properly bushed (.06” pin/.062 bushing, as I or guntech or gretan do) with the bushing/pin designed so the firing pin tip is still captured by the bushing while cocked is a good, accepted and supported fix that has the advantage of less surface area exposed to pressure than a .075 pin/bushing.
 
Are you saying people are turning a firing pin down to ~.060” but bushing bolt to .075”?
NO,that is NOT what I referenced/posted.

As per Slimbo's pic
OEM Rem .075" stock firing pin tip & un-bushed breech face on LH side.
OEM Rem w/.062" turned pin TIP & bushed breech face on RH side.

My concerns that I've seen/witnessed hundreds of times-
The BUSHING needs to be long enough to support the smaller diameter of the turned pin or it will bend/break.

Most just bush the breech face less that 3/16" depth,then turn the pin back 1/2' or more.
 
Guess what happens if you have an over pressure ie: f- - - ed up reload, it will blow that bushing back in your bolt another spot pressure goes instead of where it is supposed to!
 
It’s not to load over pressure, it’s to shoot a cartridge that uses small rifle primers in an action designed for large rifle primers.
 
You must log in or register to reply here.
Back
Top Bottom