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Posted: 4/10/2006 5:52:59 PM EDT
The headspacing on two of my RC K98s are off (checked with go/nogo/field gauges)....is there a way to fix this aside from swapping bolts or pulling barrels? The electronumbers make them force matched.....

thanks..
Link Posted: 4/10/2006 7:44:04 PM EDT
And on this one....you are right....swap bolt, swap barrel, or rechamber. That is all you can do....but what do I know. Someone may have a different idea that may work.
Link Posted: 4/10/2006 7:47:33 PM EDT

Originally Posted By fidoman:
And on this one....you are right....swap bolt, swap barrel, or rechamber. That is all you can do....but what do I know. Someone may have a different idea that may work.



thats rough, how and why would the Ruskies electropencil the bolts to match the rest of the rifle, if the headspacing doesnt check out? this doesnt make sense....AHHHH
Link Posted: 4/10/2006 8:52:38 PM EDT
Are you saying the bolt closed on a field gauge? Or just on the No-Go and Go gauges. SAMMI gauges are tighter tolerance than the original mil spec gauges. If it would not close on a Field gauge you're still ok.
Link Posted: 4/10/2006 9:14:04 PM EDT
bolts didnt close on any gauges, go, nogo, and field
Link Posted: 4/10/2006 9:25:37 PM EDT
Huh?

Would you care to elaborate?

DJ


Originally Posted By Dieter122:
bolts didnt close on any gauges, go, nogo, and field

Link Posted: 4/10/2006 9:32:49 PM EDT

Originally Posted By djenkins:
Huh?

Would you care to elaborate?

DJ


Originally Posted By Dieter122:
bolts didnt close on any gauges, go, nogo, and field




I put the different gauges into the 2 K98s, and the bolts would not close on any of them....not on the "go" gauge, the "nogo" gauge, or the "field" gauge..... the bolts are supposed to close on the "go" gauges, but not on the "nogo" and "field" gauges....

Link Posted: 4/10/2006 9:33:13 PM EDT

Originally Posted By djenkins:
Huh?

Would you care to elaborate?

DJ


Originally Posted By Dieter122:
bolts didnt close on any gauges, go, nogo, and field




+1

Are you SURE the chamber is completely clean of cosmoline? Dried cosmo can be hard a rock and a bear to get out sometimes. Have you tried to chamber a round? If you can chamber a round with no more than slight resistance, go shoot it!

If you have short head space it's a simple matter for a GOOD gunsmith to ream it to the correct size.
Link Posted: 4/10/2006 9:52:27 PM EDT
Did you remove the extractor from the bolt before checking the headspacing?
Link Posted: 4/11/2006 7:58:58 AM EDT
the rifles are clean of cosmoline, and no I didnt remove the extractor..

but I didnt remove the extractor on my other two K98s and they checked out fine
Link Posted: 4/11/2006 12:24:09 PM EDT
they could possibly be pretty tight after rearsenaling. I had a Russian M38 that was a bitch to close on a round, no problem though extracting after firing the round. Just go to the range and close on a live round and if it closes it should be fine. May be a little tight, no big deal.
Link Posted: 4/11/2006 2:37:18 PM EDT

Originally Posted By MauserMark:
they could possibly be pretty tight after rearsenaling. I had a Russian M38 that was a bitch to close on a round, no problem though extracting after firing the round. Just go to the range and close on a live round and if it closes it should be fine. May be a little tight, no big deal.



both rifles chambered a LIVE Greek 8mm round, neither were tight to close.....both extracted them just fine too (didnt fire them though).....

AHHH whys it so confusing...

ideas?

just rearsenaled really tight specs?
Link Posted: 4/11/2006 2:52:15 PM EDT
[Last Edit: 4/11/2006 2:53:57 PM EDT by Bob1984]

Originally Posted By Dieter122:

Originally Posted By MauserMark:
they could possibly be pretty tight after rearsenaling. I had a Russian M38 that was a bitch to close on a round, no problem though extracting after firing the round. Just go to the range and close on a live round and if it closes it should be fine. May be a little tight, no big deal.



both rifles chambered a LIVE Greek 8mm round, neither were tight to close.....both extracted them just fine too (didnt fire them though).....

AHHH whys it so confusing...

ideas?

just rearsenaled really tight specs?



If you have land that you can use as a private range without anyone else around (or a friend), put the rifles in some kind of vise (or mount them securely to something using other means), tie a string around the trigger, chamber a round, pull the string. If the rifle didn't blow up, that's a good sign .

Next, open the bolt and inspect the cases. If they've got torn/sheared off rims or partially blown-out cases, then you've got excessive headspace. It's probably worthwhile to look at the locking lugs and use a mirror to inspect the chamber after this, just in case there may be anything wrong there.

In this case, I would definitely check the chamber again to make sure there was no dried cosmoline in the chamber. That's very unusual that they chamber and extract live ammo, but fail to close on any of your gauges. Perhaps try the gauges on a rifle that you know to be in spec to ensure you don't have faulty gauges ?
Link Posted: 4/11/2006 2:57:33 PM EDT
i tried the gauges on my first K98 which i had checked for headspacing and checked out...and it passed the gauge test......
Link Posted: 4/11/2006 3:28:33 PM EDT

Originally Posted By Dieter122:
i tried the gauges on my first K98 which i had checked for headspacing and checked out...and it passed the gauge test......



Yeah, sounds to me like the Russians may well have gotten the headspace a little tight. Found a interesting article on headspacing in general: www.armalite.com/library/techNotes/tnote11.htm

Try cleaning the chamber again, if you still have problems, take it to a gunsmith.
Link Posted: 4/11/2006 3:31:34 PM EDT

Originally Posted By Bob1984:

Originally Posted By Dieter122:
i tried the gauges on my first K98 which i had checked for headspacing and checked out...and it passed the gauge test......



Yeah, sounds to me like the Russians may well have gotten the headspace a little tight. Found a interesting article on headspacing in general: www.armalite.com/library/techNotes/tnote11.htm

Try cleaning the chamber again, if you still have problems, take it to a gunsmith.



thanks for the links and info

crazy Russians... haha

ill look into it
Link Posted: 4/11/2006 3:40:21 PM EDT

Originally Posted By Dieter122:

Originally Posted By Bob1984:

Originally Posted By Dieter122:
i tried the gauges on my first K98 which i had checked for headspacing and checked out...and it passed the gauge test......



Yeah, sounds to me like the Russians may well have gotten the headspace a little tight. Found a interesting article on headspacing in general: www.armalite.com/library/techNotes/tnote11.htm

Try cleaning the chamber again, if you still have problems, take it to a gunsmith.



thanks for the links and info

crazy Russians... haha

ill look into it



Your welcome, found something else that should be more specific to your problem www.surplusrifle.com/shooting/headspace/index.asp Wish I had found this one earlier myself. Looks like certain brands of headspace gauge require both the extractor and firing pin to be removed.
Link Posted: 4/11/2006 3:55:23 PM EDT
WOW, i listed the k98s for sale, both are SOLD now,
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