I've used it in 44 magnum. It is perfectly good. However, in the case of 44 magnum Federal brass has the reputation of having a smaller case capacity than other brands. This can mean higher pressures. Be sure to check into this for your cartridges. It's not a bad thing, but it means that the maximum charge will probably be smaller than for another brand of brass that has a larger case capacity. I have no idea of whether this applies to Federal bottleneck cases.