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Thread: 257 Roberts & NOE 260-122-FN-AN2

  1. #1
    Boolit Master
    Join Date
    Apr 2005
    Posts
    566

    257 Roberts & NOE 260-122-FN-AN2

    I needed to fireform some 6mm Remington brass to 257 Roberts, so I loaded up 49 rounds (screwed 1 case up) with 2400 and shot 4 foulers and then 3 15 round groups @ 100 yards. 14.5 gr of 2400 was 2.309" with 14 in 1.551, 15 gr of 2400 was 1.801 with 14 in 1.720" and 15.5 gr of 24 was 1.594 with 14 in 1.171". There was no cleaning between the groups.......I'll neck size these cases and retry.Click image for larger version. 

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    "Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut." - Ernest Hemingway

  2. #2
    Boolit Bub
    Join Date
    Jan 2008
    Location
    middle Tenn.
    Posts
    41
    Please continue with load development for cast loads in the Roberts. I have a Ruger Hawkeye Roberts and a few 100 gr. gas check bullets that I need to start on. I'd like to know where your project leads.

    Thanks

  3. #3
    Boolit Master
    Join Date
    Apr 2005
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    566
    Tried some neck sized cases last evening....results as follows for 10 shot groups @ 100 yards
    Group 1......14.5 gr of 2400......1.584" with 9 in 1.026"

    Group 2......15.0 gr of 2400......1.368" with 9 in .877"


    Group 3.....15.5 gr of 2400......1.308" with 9 in .995"



    Group 4....16.0 gr of 2400......1.572" with 9 in 1.353"


    Next will concentrate on the 15 and 15.5 loads, paying more attention to quality control and bench technique.
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    "Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut." - Ernest Hemingway

  4. #4
    Boolit Master Idaho Mule's Avatar
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    Jun 2012
    Location
    Viola, Idaho
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    917
    Just out of curiosity, is "the flyer" your first shot in each group? JW

  5. #5
    Boolit Master
    Join Date
    Apr 2005
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    566
    Quote Originally Posted by Idaho Mule View Post
    Just out of curiosity, is "the flyer" your first shot in each group? JW
    Nope...………...
    "Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut." - Ernest Hemingway

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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