Remington 700 Firing pin drag

[clowdis]

It is not uncommon to flare the end of the slot on Mausers to allow the bolt to close without catching the firing pin. Mauser bolts have a lot more clearance than Remington's but the fix is still the same.

 

[Albany Mountain]

The bolt shroud position is based on the seating of the cocking piece on the recess on the bolt. Either this recess is ground in a abnormal location or the entire camming ram was located in an off position. You can buy cocking pieces I believe from PTG or brownells. You may be able to influence the shroud position by grinding the mating surface of the cocking piece. If you can't, grind down the side contacting the action. If there is no drag in the firing position, it is not necessary to worry about it.

 

[Jesswil61]

Just and off the wall question, has the bore of this action been trued/ reamed? If so, how?

 

[tonyben]

Just and off the wall question, has the bore of this action been trued/ reamed? If so, how?

All I've done so far is square the face of the receiver.

Post in thread 'First Remington 700 build. Do nothing at all, true the face or full blueprint?'

Nov 30, 2025

The barrel should be back from black oxide tomorrow. I also bought a 1/4” thick PTG ground lug and was able to throw it in with the batch to have it black oxide as well.

In the meantime, I jigged up the action and got it aligned. The face only had 0.001” runout and I gave it a skim pass. I ran my dial indicator over the threads and there’s about 0.008” of runout in the receiver threads. I rotated the receiver 90 degrees and ran my indicator over the threads to get a reading, rotated another 90 degrees, etc…

I haven’t checked the bolt lugs yet. I need to...

• tonyben

• 

 

[tonyben]

Why wouldn't you grind ~.015" off of it?

Yes, that's an option. My specialty is a different platform and the 700 is new to me, so I'm running all my findings by this group to see what issues are common and what's not; and what's the common fix and what's not. I'm trying to find out the generally accepted practices on this platform.

Tony.

 

[Jesswil61]

All I've done so far is square the face of the receiver.

Post in thread 'First Remington 700 build. Do nothing at all, true the face or full blueprint?'

Nov 30, 2025

The barrel should be back from black oxide tomorrow. I also bought a 1/4” thick PTG ground lug and was able to throw it in with the batch to have it black oxide as well.

In the meantime, I jigged up the action and got it aligned. The face only had 0.001” runout and I gave it a skim pass. I ran my dial indicator over the threads and there’s about 0.008” of runout in the receiver threads. I rotated the receiver 90 degrees and ran my indicator over the threads to get a reading, rotated another 90 degrees, etc…

I haven’t checked the bolt lugs yet. I need to...

• tonyben

• 

Post in thread 'First Remington 700 build. Do nothing at all, true the face or full blueprint?'

Nov 30, 2025

The barrel should be back from black oxide tomorrow. I also bought a 1/4” thick PTG ground lug and was able to throw it in with the batch to have it black oxide as well.

In the meantime, I jigged up the action and got it aligned. The face only had 0.001” runout and I gave it a skim pass. I ran my dial indicator over the threads and there’s about 0.008” of runout in the receiver threads. I rotated the receiver 90 degrees and ran my indicator over the threads to get a reading, rotated another 90 degrees, etc…

I haven’t checked the bolt lugs yet. I need to...

• tonyben

• 

 

[Jesswil61]

I'm in the same thought of everyone saying just open the action groove up, I would be interested in checking to see if the notch is parallel with the action bore centerline, but that's my curse of curiosity.

 

[SpencerC87]

**Edit** I took the firing pin from another action and put it in this one and the binding is gone. Upon further observation, it seems the firing pin channel at the tang might be milled just slightly off center. If you look at the action screw, the hole isn't centered on the firing pin tail channel.

When you swapped pins, did you swap the whole assembly (pin, shroud, cocking piece) or just the pin itself? If you swapped the assembly, have you tried just the shroud? The slot in the shroud for the cocking piece has much less clearance than the cocking piece does to the receiver slot. I would be interested to hear if the shroud is the issue, though it also looks like there is a burr on the side of the slot at the edge of the screw hole, taking a file to the area to clean it up wouldn't hurt.

 

[tonyben]

When you swapped pins, did you swap the whole assembly (pin, shroud, cocking piece) or just the pin itself? If you swapped the assembly, have you tried just the shroud? The slot in the shroud for the cocking piece has much less clearance than the cocking piece does to the receiver slot. I would be interested to hear if the shroud is the issue, though it also looks like there is a burr on the side of the slot at the edge of the screw hole, taking a file to the area to clean it up wouldn't hurt.

I swapped the whole assembly. I don't have the tool to disassemble the assembly yet.

 

[SpencerC87]

You'll need to get them sooner than later. There is too much to do/check/modify in the assembly to not have them. I would also check the pieces before cutting into my receiver, even if the cut would just be for clearance.

 

[Walt Krafft]

Firing pin travel means more than protrusion. Look at the whole forest not just a couple of trees.

 

[WSnyder]

Firing pin travel means more than protrusion. Look at the whole forest not just a couple of trees.

On that line of thinking: With his .070”+ of protrusion he’s effectively lost .015-.020” of available pin fall. But you are exactly correct in that there’s a lot of trees to take care of in this forest

 

[tonyben]

Here are my measurements for pin fall with the trigger installed:
Bolt closed and cocked: 0.040"
Fired: 0.235"
Total fall: 0.275"

 

[Jesswil61]

Here are my measurements for pin fall with the trigger installed:
Bolt closed and cocked: 0.040"
Fired: 0.235"
Total fall: 0.275"

Trying to understand these dimensions, from what reference point? Is this not .195" of fall? If you put a dial on it cocked zero'd what is the fall from that point? In my thoughts I like it to let off to the trigger but that requires to set it up with no cock on close.

 

[tonyben]

The

Trying to understand these dimensions, from what reference point? Is this not .195" of fall? If you put a dial on it cocked zero'd what is the fall from that point? In my thoughts I like it to let off to the trigger but that requires to set it up with no cock on close.

The cocking piece sticks out 0.040" past the bolt plug before firing.

The cocking piece is recessed 0.235" inside the bolt plug when fired.

Add the two numbers together and you have the total firing pin fall of 0.275"

 

[bugman]

Here are my measurements for pin fall with the trigger installed:
Bolt closed and cocked: 0.040"
Fired: 0.235"
Total fall: 0.275"

What is the cock-on-close dimension?
Often, good pin fall dimensions are the result of excessive cock-on-close.