I guess it depends how lean you are. The muscle in my leg is very close to the top and very lean … I did .5 and I felt it go into the muscle. Your just going really deep. I guess you could hit bone and that would be it.
Do you have allot of fat and skin… the glute is all muscle for most men as well. You don’t need to inject more than 1”… I’ve never heard of the 1.5 daggers