And it looks nice!
FYI, thrash has the EXACT same power as outrage. But I get what you mean :), outrage sounds AND looks better than thrash, plus outrage has less resistances than thrash.
I think that the power of bolt rampage would be lowered down to 110 as oppose to 120 for a number of reasons:
1. It can cause a status ailment (paralysis), unlike thrash and outrage
2. It is super-effective against water and flying types
3. It isn't resisted by steel types like thrash and outrage is