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Thread: 8x50R Aus Forming Issues

  1. #21
    Boolit Buddy
    Join Date
    Sep 2005
    Posts
    480
    Does unfiered 7.62x54r cartridges fit in the chamber ok?

  2. #22
    Boolit Master Moleman-'s Avatar
    Join Date
    Jul 2016
    Location
    SW Michigan next to a corn field
    Posts
    1,301
    I was hoping the annealing would do the trick for you. You don't suppose they sent a 8x56R or a 8x50 Lebel die mismarked as a 8x50R do you? Your chamber cast looks like a 8x50R which has more of a shoulder than the 8x56R. I'd be tempted to do a casting of the die to see what the ID of it measures.

  3. #23
    Boolit Buddy
    Join Date
    Nov 2022
    Location
    Minnesota, US
    Posts
    148
    I haven’t had the ability to test any, but FL-sized 7.62x54R does not fit...hits the shoulder.

  4. #24
    Boolit Buddy
    Join Date
    Nov 2022
    Location
    Minnesota, US
    Posts
    148
    Quote Originally Posted by Moleman- View Post
    I was hoping the annealing would do the trick for you. You don't suppose they sent a 8x56R or a 8x50 Lebel die mismarked as a 8x50R do you? Your chamber cast looks like a 8x50R which has more of a shoulder than the 8x56R. I'd be tempted to do a casting of the die to see what the ID of it measures.
    I don’t believe the manufacturer makes 8x50R-Lebel dies, nor 8x56R dies. My chamber cast does look like an 8x50R vs an 8x56R (and 8x56R won’t chamber anyway...got some “free” with my en-bloc clips).
    One other possibility is that at one point, this rifle may have had its barrel removed and re-attached...what would be the result if it were tightened one revolution too much? Would that effectively shorten the chamber 1 thread width? Is that even a possibility? I’ve never removed or attached a barrel before and am uncertain what all goes into the process of head spacing for a rimmed-cartridge rifle barrel... any input from those whom have?

  5. #25
    Boolit Buddy
    Join Date
    Nov 2021
    Location
    Minnesota
    Posts
    450
    A rimmed cartridge should headspace on the rim, not the shoulder. The chamber can actually be somewhat sloppy from that standpoint as the shoulder just needs to allow the cartridge to chamber. Critical headspace dimension is the rim thickness in relation to the bolt face.

  6. #26
    Boolit Buddy
    Join Date
    Nov 2022
    Location
    Minnesota, US
    Posts
    148
    On suggestion of a member I tried taking a formed case, removing the decapping pin, and pressing it back on the die on top of the shell holder. This helped, but a dummy round still won’t quite fully chamber. The case revealed scratches mid-shoulder now. I’m going to try new PPU brass, since that’s what everyone else seems to be having success with, and if that doesn’t work the die is going to be trimmed.

    Has anyone else had issues with a new 8x50R die they purchased in the pst few weeks?

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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