If Goku was 60k, the Crusher Ball was likely <50k. I just think the Ginyus were not all that great at amping attacks. Well, the entire Freeza empire, actually.
I think it has better amp than Reacoom's Eraser Gun. If you're looking for numbers, I have the Crusher Ball at 50k compared to Goku's 67.5k and Eraser Gun's 40k.