I don't know if you hand load or not but I would not own a .257 otherwise. R-22, R-25, 7828, H1000 and Magnum are all good powders to try. Very sorry to hear about your brother. My condolences.

Faith and love of others knows no mileage nor bounds. That's simply the way it is.
dogzapper

After the game is over, the king and the pawn go into the same box.
Italian Proverb