133 Berger Elite 257 Weatherby

257Tony

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7828 has been the go to for that cartridge with 100-120 grain bullets, it's been available lately also. Never personally used it with anything heavier than a 120 though.
 

FEENIX

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I just got off the phone with Cory (I cannot remember his LRH username) from Berger Tech support, and here are some powder recommendations he has that I have in my powder list:

IMR 7977 - 59.2 - 65
H1000 - 61.1 - 67.1
Retumbo and IMR 8133 are the same - 63.8 - 70.1
RL33 - 67.7 - 74.4

Cory said the H1000 is the ideal burn rate for the Berger 133s, and COAL is 3.309."
 

Deputy819

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I just got off the phone with Cory (I cannot remember his LRH username) from Berger Tech support,
Hasn’t been on here for a few months it looks like..🤔

087A064C-8A9A-48C1-9C5E-3FFDD81FBADD.jpeg
 

FEENIX

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Berger tech said IMR 8133 and Retumbo are one and the same powder ! Does CNN or the New York times know this ?
No, they are not the same powder, but it just so happen the recommended min and max are the same on their record. Also, ...

IMR ENDURON 8133 = RETUMBO.JPG


It's a load recommendation they currently have; what you do with it is entirely up to you.

Since H1000 was on the list too ...

IMR ENDURON 7977 = H1000.JPG


However, they do not have different load recommendation for the IMR 7977 and and H1000.
 
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