100s were/are often loaded with grease. They benefit from removal to be frank but it can make the action sound louder.

If you do this to a new gun in warranty then potentially it could cause issues.

I guess the argument its better to have too much than not enough but I found pre degreasing, the power could drift either direction.

What you want is the right amount.

I would recommend Ratworks.

Swap to alloy and flog the steel. Balance is a total game changer. Phils regs blast the HW 100 reg clear out of the water.

Both worthwhile mods I would do ASAP or the next day out of warranty if you prefer