R Weapon: 10 -> 15
Magical Holy Grail (R Holy Grail):20 -> 50
SR Weapon:35 -> 80
False Holy Grail (SR Holy Grail):50 -> 150
SSR Weapon:350 -> 550
So a slvl6 SSR weapon will go down from 850 skill points to 550, and slvl4 SR weapons will go down from 140 to 80.