An energetic charge for propellant fracturing may include a propellant material or a shape of the energetic charge being selected such that a rise time of a deflagration of the energetic charge is determined to be in the propellant fracturing regime. The propellant fracturing regime may be defined by a set of linear equations associated with the rise time for pressure from the deflagration of the energetic charge. The rise time may be calculated based on an equation {dot over (ε)}=(dP/dt)/E, where {dot over (ε)} represents a strain rate, dP/dt represents a change in pressure with respect to time, and E is Young's modulus, and where the set of linear equations relate the rise time to a borehole diameter.