Daystate Redwolf 177 hp

Hi i bought a red wolf 177 HP about 2 weeks ago.i have a few questions about the gun and i will appreciate very much any info you will give me.

first:this is 60 cm barrel but is it a polygon barrel?

second;can i shoot slugs out of it?

third;the best pelets i tried beyond 70 meters is jsb 10.34 at low power{900fps} and piledrivers 21 grains at high power{800fps} The jsb16.20{920fps} is pellet on pellet at 40 meters but after 70 is starts to wobble. is there anything else you tried that works well?

I use the single shot tray for all the tests .

Thank you very much.