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Thread: Cast and the 257 Bob

  1. #1
    Boolit Master waco's Avatar
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    Cast and the 257 Bob

    So I have my Uncle's old Ruger M77 Tang safety sitting in the back of the safe doing nothing. I am thinking of buying a plain base 105gr Noe mold to play around with.
    http://noebulletmolds.com/NV/product...oducts_id=1238
    What have been your results with cast in the Roberts?
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  2. #2
    Boolit Master waco's Avatar
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    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  3. #3
    Boolit Master
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    Quote Originally Posted by waco View Post
    So I have my Uncle's old Ruger M77 Tang safety sitting in the back of the safe doing nothing. I am thinking of buying a plain base 105gr Noe mold to play around with.
    http://noebulletmolds.com/NV/product...oducts_id=1238
    What have been your results with cast in the Roberts?
    http://castboolits.gunloads.com/show...260-122-FN-AN2
    "Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut." - Ernest Hemingway

  4. #4
    Moderator

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    I haven't tried it yet, thinking a PCed boolit like that one should be fun They do make 4 & 5 cavity molds for that one, even. Used 100 Gr. j-word Spitzers in the past.

  5. #5
    Boolit Master
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    120 grain Sierra 36.0 grains IMR 4064. USED TO BE 35.5 WAS MAX. 2700 F.P.S. NOW... Very mild. 7 x 57's - 6 mm cases all show higher pressures . The only difference mind had , was moly coated bullets..

  6. #6
    Boolit Buddy
    Mr Peabody's Avatar
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    I used to shoot a gc Lyman rn in mine. It was a dandy. If I remember right it was 258325, weighed close to 120gr's with ww. You'll like it.

  7. #7
    Boolit Grand Master Texas by God's Avatar
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    I had a Lyman 90gr fpgc mould that worked well over Red Dot in my 25-06. However driving a Ferrari at school zone speeds didn't appeal to me much so I sold the mould. I always thought the .257 Roberts would be perfect, but we have a .250 Savage and the 25-06 so I never could justify one.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  8. #8
    Boolit Buddy
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    The 120 and 100 gr RCBS gas check boolits seem to work well. I bought some 100 gr gas check boolits from someone, and they worked very well...particularly after I started seating them .015" into the rifling. YMMV!

  9. #9
    Boolit Bub
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    I've got a 257 Rob AI. It's done superbly with the 257312GC (frequently 5 shot groups inside an inch at 100yds). I also have a 257325 clone from NOE (260325 I think it's around 117gr) and that's shown a lot of promise as well. This is all with Alliant 2400 in the 13.5-16.5gr range.

    I have a Savage with whatever the standard 257Rob twist rate--I think 1:10".

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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