257 Weatherby Mag 100grn TSX and IMR 7828?

[mike88605]

I'm looking for load data for my 257 Roy using IMR 7828 and 100grn TSX.



Any help would be great.

Thanks Mike

 

[FlyinBryan]

is it a 257weatherby mag? or 257 roberts?

 

[Silent Sam]

That powder is on the slow side for that weight bullet. Barnes shows 61gr as a starting load with IMR7828SSC. I would call Barnes and see what they say.

 

[Offfhand]

go to Hodgdon website