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Bolt Swap Question? #15438882 11/21/20
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DrGnarr Offline OP
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I’m having issues, which I believe are related to the firing
pin in my 25-06 rem mountain rifle. No time to repair before the season. Can I just swap bolts with my 30-06 mountain rifle?


Re: Bolt Swap Question? [Re: DrGnarr] #15438903 11/21/20
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nimrod1949 Offline
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If you have a way to check headspace it could work but it isn’t a straight swap without checking. Swapping firing pin assemblies would be an easy and safe test. Or just use the 30-06


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Re: Bolt Swap Question? [Re: DrGnarr] #15438932 11/21/20
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PJGunner Offline
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Interesting question. Yes, no, maybe. Do you have a gunsmith handy who can check the headspace in both rifles after the swap, assuming they both fit and work properly with the switch? That would be my main worry. I tried a swap using my two M700 Classics and it seems to work OK so other that the possible headspace issue I think it would work.
Paul B.


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Re: Bolt Swap Question? [Re: DrGnarr] #15439267 11/21/20
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Jordan Smith Offline
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Try chambering a sized case with the other bolt. Then put a piece of masking tape on the head of the case and try again. If it chambers without the tape but doesn't with the tape, you should be okay to use the bolt.

Re: Bolt Swap Question? [Re: DrGnarr] #15439271 11/21/20
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Bearcat74 Offline
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Why wouldn’t you just swap the firing pin assembly?


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Re: Bolt Swap Question? [Re: Bearcat74] #15439649 11/21/20
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Jordan Smith Offline
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Originally Posted by Bearcat74

Why wouldn’t you just swap the firing pin assembly?

Good question. Or just use the .30-06, as nimrod mentioned.

Re: Bolt Swap Question? [Re: Jordan Smith] #15439724 11/21/20
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DrGnarr Offline OP
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Originally Posted by Jordan Smith
Originally Posted by Bearcat74

Why wouldn’t you just swap the firing pin assembly?

Good question. Or just use the .30-06, as nimrod mentioned.

Would have been very easy to just swap bolts. It’s really no biggie, but I have been doing some load development with the 25-06 and was wanting to use it. I’ll probably just run with the 30-06 or one of the others....
Thanks all

Re: Bolt Swap Question? [Re: DrGnarr] #15439736 11/21/20
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mag410 Online Content
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Would take less than a minute to swap firing pin assembly?

Re: Bolt Swap Question? [Re: DrGnarr] #15440507 11/21/20
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Dans40X Offline
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IF,both rifles have not been trued/rebarreled or molested-

Measure the LENGTH of the bolt lugs.
.440" is mean dimension.

Swap the bolts & don't look back.

The last 4 digits of the receiver serial number are inscribed in the bolt body for identification purposes.


IF,either action has been trued/re-barreled you will need to take a couple measurements from the trued bolt for comparison.


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Re: Bolt Swap Question? [Re: Jordan Smith] #15440523 11/21/20
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dye7barrel Offline
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Originally Posted by Jordan Smith
Try chambering a sized case with the other bolt. Then put a piece of masking tape on the head of the case and try again. If it chambers without the tape but doesn't with the tape, you should be okay to use the bolt.


Do this and be done with it.

IC-B

Re: Bolt Swap Question? [Re: DrGnarr] #15440541 11/21/20
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VaHillbilly Offline
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Originally Posted by DrGnarr
I’m having issues, which I believe are related to the firing
pin in my 25-06 rem mountain rifle. No time to repair before the season. Can I just swap bolts with my 30-06 mountain rifle?

I would Swap firing pins first and see if that corrects your issue....Good luck...Hb

Re: Bolt Swap Question? [Re: DrGnarr] #15440650 11/21/20
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okie john Offline
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What problem are you having?


Okie John

Re: Bolt Swap Question? [Re: okie john] #15440677 11/21/20
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DrGnarr Offline OP
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Originally Posted by okie john
What problem are you having?


Okie John

It’s weird. The first shot, sometimes the second, have weak primer strikes. I first chalked it up to old primers but then it happened with new primers. One or two shots with weak primer strikes and then I can shoot all day just fine. The exact thing has happened in four trips to the range. Strange. Figured I’d replace the firing pin and spring.

I just stripped the whole bolt and pin down, cleaned, lube very very lightly, and reassembled. We’ll see. Should be able to hit the range Monday.

Anyone else have any other ideas?

Last edited by DrGnarr; 11/22/20.
Re: Bolt Swap Question? [Re: DrGnarr] #15440767 11/22/20
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las Offline
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The chamber could be slightly too large, or if using reloads, maybe the shoulder is set back too far. (per the cartridge base tape- testing above - only neck sizing of fired cases in the same gun will alleviate) Short shoulders or sloppy chambers might allow the cartridge enough forward movement or displacement on firing to lessen the firing pin strike force, tho this should not happen only on the first round or two, but elsewhere.

Are the primers fully seated in clean, tight pockets?

But it really sounds like firing pin mechanics - gunk or rough surfaces or a burr somewhere may be sticking things up and weakening or shortening the strike until loosened up by the first few rounds Thickened oil (by evaporation, dirt, or cold) on the fp shaft could do this. I use only dry to touch stuff like Eezox or Corrosion X for that purpose. So good deal on the bolt strip and clean.

I would also check firing pin protrusion and for a shortened/weakened fp spring. (Never, ever, store a firearm cocked - dry firing it on storage will not hurt it, and will help preserve fp spring strength.)

You may find it is a combination of things.

If replacing fp and/or spring, Tubb may make a kit or spring for the Rem? , as well as for the M70 (installed on my 7X57)

You can also buy "overstrength" fp springs. (Wolf?)

Last edited by las; 11/22/20.

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Re: Bolt Swap Question? [Re: las] #15440830 11/22/20
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DrGnarr Offline OP
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Originally Posted by las
The chamber could be slightly too large, or if using reloads, maybe the shoulder is set back too far. (per the cartridge base tape- testing above - only neck sizing of fired cases in the same gun will alleviate) Short shoulders or sloppy chambers might allow the cartridge enough forward movement or displacement on firing to lessen the firing pin strike force, tho this should not happen only on the first round or two, but elsewhere.

Are the primers fully seated in clean, tight pockets?

But it really sounds like firing pin mechanics - gunk or rough surfaces or a burr somewhere may be sticking things up and weakening or shortening the strike until loosened up by the first few rounds Thickened oil (by evaporation, dirt, or cold) on the fp shaft could do this. I use only dry to touch stuff like Eezox or Corrosion X for that purpose. So good deal on the bolt strip and clean.

I would also check firing pin protrusion and for a shortened/weakened fp spring. (Never, ever, store a firearm cocked - dry firing it on storage will not hurt it, and will help preserve fp spring strength.)

You may find it is a combination of things.

If replacing fp and/or spring, Tubb may make a kit or spring for the Rem? , as well as for the M70 (installed on my 7X57)

You can also buy "overstrength" fp springs. (Wolf?)


I’m almost certain with these reloads I only resized the neck, which is what I do 99% of the time for all my reloads. I’ll look into it though.

I did buy it used and there is a custom work done on it. It was an ADL. The ADL barrel was replaced with a rem mountain rifle barrel.

Maybe I’ll take it to a smith for a once over if my clean job doesn’t work for me. It was pretty funky in there.

Re: Bolt Swap Question? [Re: DrGnarr] #15440841 11/22/20
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Hancock27 Offline
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1: go tot the range
2: put the other bolt in the rifle
3: load the rifle
4: pull the trigger>


Since the gauges for the 30.06 and 25/05 (also 280, 270, 35 whelan) are the SAME, what EXACTLY do people think you're checking on "head space"??? So many internet experts "Check the headspace" have NP Idea what it is ot what it means.

There was a discussion on another forum where a guy inherited a rifle (a well known brand) and could get a replacement bolt from a major supplier. For some reason his family had taken the bolt out and lost it. Lots of people on that forum were : Check the head space".... I said order the bolt from the supplier, and shoot it...

From Brownells Site:

ITEM DETAILS
Cartridge: 25-06 Remington, 6.5-06, 270 Winchester, 30-06 Springfield, 8 mm-06, 338-06, 35 Whelen

Style: Go Gauge

Made in the USA


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Re: Bolt Swap Question? [Re: Hancock27] #15440993 11/22/20
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huntsman22 Offline
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you should get a first clue.

Re: Bolt Swap Question? [Re: huntsman22] #15441346 11/22/20
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Jordan Smith Offline
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Originally Posted by huntsman22
you should get a first clue.

You got that right, Don. He should be taking notes here, not giving advise. Somebody could get hurt.


Hancock,

Headspace is set for a given receiver and bolt when the barrel is chambered. Different bolts may have different length/geometry of lugs, and may interface differently with the receiver, causing a change in headspace. Headspace could be reset for that bolt by extending the chamber with a finish reamer, taking material off the back of the bolt lugs, or by setting back the barrel and rechambering.

Bottom line is, it’s possible for one bolt to close on a GO and not close on a NO-GO, but for another bolt in the same rifle not to do so.

Re: Bolt Swap Question? [Re: DrGnarr] #15441978 11/22/20
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PJGunner Offline
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"Since the gauges for the 30.06 and 25/05 (also 280, 270, 35 whelan) are the SAME,"

That's not quite right. The .280 Rem. is a fraction longer to Darwin types cannot load it into a .270. Proper headspace for the .280 would be excess headspace for the 2505..270, 30-06 and .35 Whelen.
Paul B.


Our forefathers did not politely protest the British.They did not vote them out of office, nor did they impeach the king,march on the capitol or ask permission for their rights. ----------------They just shot them.
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Re: Bolt Swap Question? [Re: DrGnarr] #15442024 11/22/20
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mjbgalt Offline
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That is like saying all 2x4's are the same length. Not after being installed. Same as headspace. It fits THAT barrel and bolt together. We are talking about thousandths here

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