lol , no way to get those ppms is you play normally.
Even with landmines and tank .. 35 ppm or around is very rare.
except for 1-2 special maps with 2 secs respawn .
But 48 -55 ppm no way , even if you pwn bots with heavy sk whatever you want (300 kills or + ), you barely get 40-45 ppm.
(even if rating isnt enabled when bots are on , you can take a look to your sessions and ppm)