PBcastcoTitan ReloadingRepackboxInline Fabrication
Reloading EverythingLee PrecisionRotoMetals2Wideners
Load Data MidSouth Shooters Supply
Results 1 to 11 of 11

Thread: Lyman sizing die ?

  1. #1
    Boolit Buddy
    Join Date
    Aug 2016
    Location
    IOWA
    Posts
    259

    Lyman sizing die ?

    I have a Lyman 450 sizer with different dies. I just got a rcbs 45-270saa mould and cast them and went to size them to .452 in the .452 die and after sizing they are .453. was wondering if anyone has run into this before. The die is probably 10 to 15 years old. Should I get a .451 or another .452?

    Thanks Scott

  2. #2
    Boolit Grand Master

    Beagle333's Avatar
    Join Date
    Mar 2012
    Location
    Back in the woods a piece, just outside Auburn, AL.
    Posts
    5,499
    A different .452
    Not all dies are equal and you certainly can't count on them being .001" oversized as a rule. If you find a deal on a .451, it is a snap to hone it to .452 though. And you know you would be exact, for certain!
    KE4GWE - - - - - - Colt 1860, it just feels right.

  3. #3
    Boolit Master
    Join Date
    Dec 2013
    Location
    St.Germain, WI
    Posts
    722
    If they fit in the gun, I would shoot them to see if they work. Could also be what you are measuring them with. If you're using a calipers, you can easily be off by a thou.
    The only amendment the Democrats support is the 5th.

  4. #4
    Boolit Buddy
    Join Date
    Aug 2016
    Location
    IOWA
    Posts
    259
    Quote Originally Posted by upnorthwis View Post
    If they fit in the gun, I would shoot them to see if they work. Could also be what you are measuring them with. If you're using a calipers, you can easily be off by a thou.
    I am using a micrometer, and I had my throats opened to .4525 in my ruger, and they don't slip in.

  5. #5
    Boolit Master

    Calamity Jake's Avatar
    Join Date
    Mar 2005
    Location
    Okla. City
    Posts
    2,468
    Hard alloy will spring back a little after sizing.
    If .453 won't work for you then buy or trade for a .452 size die.
    Calamity Jake

    NRA Life Member
    SASS 15704
    Shoot straight, keepem in the ten ring.

  6. #6
    Moderator Emeritus


    JonB_in_Glencoe's Avatar
    Join Date
    Mar 2010
    Location
    Land of 10,000 Lakes
    Posts
    15,838
    Have you used this 452 Die before?
    if not, maybe someone lapped it out?

    Also, the 270 is a long boolit (I have a GB clone mold), if you aren't pushing the boolit all the way down into the sizing portion of the die, the drive band will not be sized all the way down. I've run into that, when trying to use the top row of lube ports of the die with a boolit with only one lube groove. Have you measured the boolit base and compare it to the drive band?
    ~~~~~~~~~~~~~~
    “If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun.”
    ― The Dalai Lama, Seattle Times, May 2001

  7. #7
    Boolit Buddy
    Join Date
    Aug 2016
    Location
    IOWA
    Posts
    259
    Quote Originally Posted by Calamity Jake View Post
    Hard alloy will spring back a little after sizing.
    If .453 won't work for you then buy or trade for a .452 size die.
    It is a .452 die

  8. #8
    Boolit Buddy
    Join Date
    Aug 2016
    Location
    IOWA
    Posts
    259
    Quote Originally Posted by JonB_in_Glencoe View Post
    Have you used this 452 Die before?
    if not, maybe someone lapped it out?

    Also, the 270 is a long boolit (I have a GB clone mold), if you aren't pushing the boolit all the way down into the sizing portion of the die, the drive band will not be sized all the way down. I've run into that, when trying to use the top row of lube ports of the die with a boolit with only one lube groove. Have you measured the boolit base and compare it to the drive band?
    Jonb, I bought the die new and have used it before but never measured them because they where just for SASS shooting. Now I have this black hawk for hunting I want the most out of it and measured it. The base and driving band are all .453. I will check tonight how deep it goes down and maybe try sizing them again.

  9. #9
    Boolit Master
    Join Date
    Mar 2005
    Location
    Spokane, Wa.
    Posts
    2,636
    What size is the boolit dropping from the mould? If it is .454 or larger, with a hard alloy, you may be experiencing "spring back" as another poster has mentioned. If they drop .453, I'd try them and see how they work. I routinely shoot .431 diameter cast boolits outta my .4285 Smith throats and get good accuracy and no leading. Alloy is Bhn 11.
    It's all chicken, even the beak!

  10. #10
    Banned

    Join Date
    Dec 2007
    Location
    soda springs Id.
    Posts
    28,088
    umm.
    453 would be correct for your 4525 throats.
    I'd try about 5,000 cylinders full before I got all worked up.

  11. #11
    Boolit Buddy
    Join Date
    Aug 2016
    Location
    IOWA
    Posts
    259
    Quote Originally Posted by runfiverun View Post
    umm.
    453 would be correct for your 4525 throats.
    I'd try about 5,000 cylinders full before I got all worked up.
    I will try them, I thought you where suppose to go under the throat size. My bad

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