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Thread: IMR SR4759 in 6.8mm SPC w/280468

  1. #1
    Boolit Master ohland's Avatar
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    Question IMR SR4759 in 6.8mm SPC w/280468

    A thousand pardons, but where is load data for the 6.8mm SPC using the Lyman 280468 L bullet of @115 gr with IMR SR4759?

    Mention of 14.5gr, low of 10gr, max of maybe 19...

    Finally have some 280468 cast, sized, and GCd. They look fairly crappy, which I think about 4oz of tin in a 20lb pot should fix. That plus the lack of fluxing for that pot... Got some beeswax and the WW lead surface was fairly smooth during the last casting session (457122s look awesome).

    Anyways, I'd like to load up some boolits and chrono them. Probably need to cast more for better accuracy..


  2. #2
    Boolit Master ohland's Avatar
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    Query to IMR Powder

    I asked the folks at IMR Powder (well, part of Hodgdon) for load data for SR4759 and 115gr weight in the 6.8mm

    Anything that gets close... 110, 120, etc

    21 July - email to imrpowder bounced, sent a query to help@hodgdon.com
    Last edited by ohland; 07-21-2011 at 09:54 AM. Reason: Email bounced

  3. #3
    Boolit Master
    cdet69's Avatar
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    I just got the same mould form a friend of mine. I am interested in your results when you get them. I was thinking of trying Trailboss in mine. I still have the same problem with no data for this round using cast. Supposedly you can not get enough Trailboss in a cartridge to cause problems. Will let you how it works out when I get a chance to do it.

  4. #4
    Boolit Master
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    I would start at about 13 gr. It should get you in the neighborhood of 1500 fps and then go from there. I am using 16 gr in my 6mm Rem and plan to use 10 gr in my 222 Rem whenever those 22 cal gas checks arrive from Midway

  5. #5
    Boolit Master ohland's Avatar
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    Unhappy Face palm - Reply on SR4759 in 6.8mm SPC

    OK, I've done due diligence. Can't say they didn't give a succinct answer...

    ////----------------------------------------------------------///

    Sorry we don't have any data for SR4759 in the 6.8 SPC.

    Mike Daly
    Customer Service Manager
    Hodgdon Family of Fine Propellants
    Hodgdon Smokeless Powder
    IMR Powder Company
    Winchester Smokeless Propellants
    GOEX Blackpowder

    -----Original Message-----
    From: Louis Ohland [mailtohland@.........]
    Sent: Thursday, July 21, 2011 8:48 AM
    To: Help Account
    Subject: IMR SR4759 in 6.8mm SPC

    I want to use IMR SR4759 with 100-115 grain cast bullets in the 6.8mm
    SPC. Is there any loading data for similar weights in the 6.8mm SPC
    using SR4759?

    v/r,
    Louis Ohland

  6. #6
    Boolit Master ohland's Avatar
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    Source for this guesstimation?

    Quote Originally Posted by quilbilly View Post
    I would start at about 13 gr. It should get you in the neighborhood of 1500 fps and then go from there. I am using 16 gr in my 6mm Rem and plan to use 10 gr in my 222 Rem whenever those 22 cal gas checks arrive from Midway
    What did you sorta base 13 grains off of?

  7. #7
    Boolit Master fourarmed's Avatar
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    I have used from 13 up to 15 grains of 4759 with a 135 gr. SAECO in my .270 Max. I think the 6.8 has a bit more case capacity, so my loads should be good for starting points.

  8. #8
    Boolit Master ohland's Avatar
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    270 Max?

    Quote Originally Posted by fourarmed View Post
    I have used from 13 up to 15 grains of 4759 with a 135 gr. SAECO in my .270 Max. I think the 6.8 has a bit more case capacity, so my loads should be good for starting points.

    Is that a 270 based on the 357 Maximum?

  9. #9
    Boolit Master fourarmed's Avatar
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    That is exactly what it is.

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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