For rifle I go with temperature stable powders whenever possible such as Varget, IMR 8208 (XBR). For other rifles such as M-14's I go with what is recommended due to the gas system such as 4064, 3031, 4895.
For high volume pistol shooting I go for economy so as little powder needed as possible, this increases the risk of a double charge so I use an RCBS lockout die.
I usually use Titegroup, or Win231/HP-38.