They are wanting to know if it is a 260 remington or a 6.5 Creedmoor or whatever of all the. 260 caliber cartridges out there.New to reloading looking for best powder for 260 cal 120 grain blastic tip ?
That's what I use in 6.5CM and it is a go-to. Still not sure of the OP's cartridge he's loading for so...wouldn't make that suggestion until that is known, IMO.H4350 seems to be the go-to powder for that caliber. I would also try Ramshot Hunter as it is the only ball powder in the 4350 burn range and meters a lot better than stick powder.