Graf & SonsTitan ReloadingStainLess Steel MediaADvertise here
Lee PrecisionRotoMetals2Inline Fabrication

Results 1 to 8 of 8

Thread: Golden ring on bolt face

  1. #1
    Boolit Bub
    Join Date
    Dec 2016
    Location
    switzerland
    Posts
    38

    Golden ring on bolt face

    Yesterday I went to my range with an handful of reduced loads plus few mild loads for my 1891 carbine. Durig the cleaning in the evening I've noticed a thing never seen before: a golden ring on the bolt face. I can remember goldened bolt faces with case manufacturer's name nicely readable for high pressure but never a ring. The pic is a bit blurred but from it Click image for larger version. 

Name:	bf.jpg 
Views:	28 
Size:	22.5 KB 
ID:	186598you can see what I'm saying.

  2. #2
    Boolit Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    7,238
    With light loads the case may have been tight against the bolt face and your seeing some rub off / scrubbing effect. What is interesting is even in the blurred pic the scrub is a ring and not even or across the bolt face indicating a slightly domed bolt face or brass with rims sprung or bent. If both were truly flat the scrub should be even across the bolt face. I have seen this on brass the case heads weren't flat and square. or on bolt faces that were sleeved incorrectly and not flat.

  3. #3
    Boolit Bub
    Join Date
    Dec 2016
    Location
    switzerland
    Posts
    38
    This is a better pic. The bolt is a virgin original spare 1891 carbine bolt with near zero headspace. These are the very first shots it handled. I think indeed to some defect occurred on the lathe turning the bolt face, maybe the face it's a bit recessed in respect to the circumference.Click image for larger version. 

Name:	bf.jpg 
Views:	24 
Size:	40.4 KB 
ID:	186677

  4. #4
    Boolit Master
    swheeler's Avatar
    Join Date
    Mar 2005
    Location
    Montana
    Posts
    4,111
    Golden ring on bolt face

    That's easy, you got a Leupold bolt!
    Hell, I was there!

  5. #5
    Super Moderator




    Buckshot's Avatar
    Join Date
    Mar 2005
    Location
    So. California
    Posts
    11,511
    ...............Artu, my thinking would be that the boltface is slightly concave. I'd suspect that viewing the base of your cartridge cases would show the same wear pattern on their perimeter? I can think of no reason why there would be anything unsafe, as you say it headspaces tightly. Any slight 'dishing' I would think would be very minimal.

    ................Buckshot
    Father Grand Caster watches over you my brother. Go now and pour yourself a hot one. May the Sacred Silver Stream be with you always

    Proud former Shooters.Com Cast Bullet alumnus and plank owner.

    "The Republic can survive a Barack Obama, who is, after all, merely a fool. It is less likely to survive a multitude of fools such as those who made him their president."

    Shrink the State End the Fed Balance the budget Make a profit Leave an inheritance

  6. #6
    Boolit Bub
    Join Date
    Dec 2016
    Location
    switzerland
    Posts
    38
    Yes, bolt face has to be concave or it has too big radius on recessed face. Otherwise thing makes no sense.

  7. #7
    Boolit Master

    Shiloh's Avatar
    Join Date
    May 2006
    Location
    Upper Midwest
    Posts
    6,333
    Wipes right out for me.

    Shiloh
    Je suis Charlie

    "A society of sheep must in time beget a government of wolves."
    Bertrand de Jouvenel

    “Any government that does not trust its citizens with firearms is either a tyranny, or planning to become one.” – Joseph P. Martino

    “If you put the federal government in charge of the Sahara Desert , in five years there would be a shortage of sand.” – Milton Friedman

    "Ideas are more powerful than guns. We would not let our enemies have guns; why should we let them have ideas?" - J. Stalin

  8. #8
    Boolit Master

    Join Date
    Mar 2013
    Location
    Northwest Ohio
    Posts
    7,238
    The only issue may be after many firing the cases bases may be concave to match the bolt face. Pressure will eventually reform them to match the supporting surface. May be 1 round or 20 depending on brass and pressures applied. It may actually be very minute amount of concave surface. .001 or less other wise primers would show backing out

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check