Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Cactus Rancher, Coolhandsluke, dan85, Widgeon71, he he
60457 Registered Users
Top Posters
dogcatcher 77414
stxranchman 52092
RWH24 44568
rifleman 43786
BOBO the Clown 41105
BMD 40539
Big Orn 37484
txshntr 33685
bill oxner 32643
sig226fan (Rguns.com) 30571
facebook
Forum Stats
60457 Members
45 Forums
475991 Topics
6244064 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Topic Options
#6306704 - 05/21/16 08:56 PM Todays's Puzzler
DStroud Offline
Pro Tracker

Registered: 11/02/11
Posts: 1156
Loc: Waco
I have a vintage 03A3 Springfield 30-06 that I recently replaced the entire bolt in. The headspace was too tight so I had it headspaced properly by Derrick at Horizon.
I had two different loads I had worked up prior so decided to check to make sure all was good. It wasn't as both loads were way too hot it seemed with both very flattened primers and a sticky both. Both according to QuickLoad are moderate loads and I checked and I am seated .100 off the lands.
Not sure what the change is that could cause these loads to be that high of pressures??

Top
#6306742 - 05/21/16 09:53 PM Re: Todays's Puzzler [Re: DStroud]
BushFamilyNine Offline
Tracker

Registered: 05/26/13
Posts: 750
Loc: Iowa
This isn't one of the Mann Accuracy versions it is? Do you have a stainless barrel?

Top
#6306749 - 05/21/16 10:01 PM Re: Todays's Puzzler [Re: DStroud]
DStroud Offline
Pro Tracker

Registered: 11/02/11
Posts: 1156
Loc: Waco
No it's a Smith Corona with a 2 groove barrel.

Top
#6306914 - 05/22/16 08:27 AM Re: Todays's Puzzler [Re: DStroud]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
D, did you verify that the load is truly still .100" off the lands? Can you describe exactly what was done to change the head spacing?
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

Top
#6306950 - 05/22/16 09:07 AM Re: Todays's Puzzler [Re: DStroud]
DStroud Offline
Pro Tracker

Registered: 11/02/11
Posts: 1156
Loc: Waco
Yes I measured first because I assumed since Derrick said they took a reamer and bumped the shoulder about .004/.005 that I might be close to lands but I still have plenty of jump it seems.
I also thought maybe there was some cutting oil or some type lube in the chamber that caused the primers to be so flattened so I cleaned the barrel and chamber good.
The sticky bolt makes me think that is not the issue though.
Going to pull some bullets and reload try again at lower charge.

Top
#6306957 - 05/22/16 09:15 AM Re: Todays's Puzzler [Re: DStroud]
charlesb Offline
Pro Tracker

Registered: 04/07/10
Posts: 1408
Loc: West Texas mountains
I would bring this to the attention of the folks at Horizon, and see what they say.

They may have a suggestion for you, or may want to take another look at the firearm.

Note that fired cases from a rifle that had too-tight headspace would be on the short side after the headspace was adjusted, creating a headspace condition. If you are using the same brass this may be the problem, or at least part of it.

The way to test this would be to re-load a few of the brass that you have fired with the new bolt, using the same load. The shoulder should now be blown out to the new dimension, eliminating any headspace condition. If they behave OK, then you have identified the problem.

If this fixes it, then I'd toss all of the old brass and start off with a new batch. Firing all of the old brass to stretch it out could be dangerous. Remember that the nut behind the trigger is the only irreplaceable part.


Edited by charlesb (05/22/16 09:34 AM)
_________________________
Kind regards, charlesb

Top
#6307063 - 05/22/16 11:05 AM Re: Todays's Puzzler [Re: DStroud]
DStroud Offline
Pro Tracker

Registered: 11/02/11
Posts: 1156
Loc: Waco
I measured a case fired with my old bolt with the Hornady headspace gauge. It measured 1.983 and my ammo that is reloaded is running 1.981-1.982.
I am glad Charles brought this up as now my brass fired with new bolt is measuring 2.003 which means my shoulder is being stretched .020 upon firing.
So I will need to fire all this brass then adjust my dies accordingly to prevent case head separation of course. BUT that still leaves the question of why the extremely flattened primers.
This is what I am thinking now. My brass is loose in chamber now since its undersized and upon firing pin hitting the primer it's pushed forward then the ignition of the powder is slamming it back against bolt face thus flattening the primer to the extreme.


Edited by DStroud (05/22/16 12:31 PM)

Top
#6307217 - 05/22/16 02:02 PM Re: Todays's Puzzler [Re: DStroud]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 6220
Loc: Wise Co.
If I was going to attempt to save all this brass which is now headspaced short, I would consider loading light charges with "junk" bullets seated out to jam the lands firmly. That way you stand a chance of blowing the shoulder back out where it needs to be without stretching the brass.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

Top
#6307263 - 05/22/16 03:06 PM Re: Todays's Puzzler [Re: DStroud]
DStroud Offline
Pro Tracker

Registered: 11/02/11
Posts: 1156
Loc: Waco
I happen to have a supply of pull down 172gr that should work fine.

Top
#6307365 - 05/22/16 04:59 PM Re: Todays's Puzzler [Re: DStroud]
booradley Offline
Pro Tracker

Registered: 01/20/11
Posts: 1692
Loc: Justin, TX
Good call charlesb.
_________________________
I joined the circus to become a clown fighter. I now know 46 different ways to kill a clown.

Top



© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide