It depends on how much cast you need and how thick the comb is on your Browning . I’ve even got one gun with a factory adjustable comb that I’ve had cast , as with the ( thick ) adjustable comb offset to where I need it there was a ‘ ledge ‘ with an uncomfortable feel , so I used bend for cast and comb for height . But personally out of choice I’d go for bending every time
Nigel Teague and Brian Webster , two extremely competent stock manipulators who have bent GD5 Mirokus for me , the high grade guns have the tube , it’s removed with a heated bar to melt the glue . Then the refitted after the bending and opening of the hole . On the twenty gauge MK 60 the stock was cast and also bent up to reduce drop at comb .
Of course bending wood carries a risk .