i had to double check and you are right but i do think it is the same principle "factory setting" but yea just gotta wait for someone with a better answer i guess
I got up to 27-28 fpe with stock 500mm dreamline with pp. Few upgrades later i get 41 fpe with 600mm. it came delivered at 18 fpe, i think 18-20 is kinda the norm with .177 tho