So, before the M&S rework, Dwarven Ramhammer would double Red Sandstone, which was great. However, it no longer doubles the sandstone, but still uses charges I just noticed. So it's bugged one way or the other.
It is technically working as intended: Ever since the rework you can either double your experience per swing or your damage per swing. While it doubles your damage you won't feel anything since you can mine the sandstone in one swing anyway - it's bascially just as if you had used the double damage mode on a low levelled rock. You sacrifice charges and experience, but do not gain anything for it.Improvements: Tooltip / (F2P) QoL v2 Quick Fixes: Invention