Evolution profile of the SNR with the shock velocity v_SNR (red), the age of the SNR t_SNR (green), and the CR particle escape energy E_max (blue) plotted against the SNR radius. Also shown is the density of the circumstellar medium n_ISM (black) out to 25 pc distance. From top to bottom are four different scenarios: 8 M_⊙ SN IIP, 15 M_⊙ SN IIP, 20 M_⊙ SN IIL/b, and 25 M_⊙ SN Ib/c. The current SNR size (15 pc) is indicated with a dashed line. The time, velocity and escape energy profiles are cut off when the shock speed is too low (v_SNR ≪ 1000 km s^-1) for applying the prescriptions of Zirakashvili & Ptuskin (2008) to compute a CR particle escape energy. See detailed parameters in Table 1.