Board Thread:Questions and Answers/@comment-31115357-20170122051803/@comment-26113680-20170123080326

Hmm...

All I can think of would be answered by the following questions.

Both of you use Assault Gun, but do you have the same weapon equipped? Were you two using the same type of bullet? Or attacking the same type of enemy? Another variable might be that the amount of bullets fired and damage dealt.

As I recall, the Blood Bullets level up similarly to the Blood Arts. Meaning that difficulty, damage dealt is something to look for as if it doesn't reach a certain treshold it won't count as gaining anything.

Albeit I might be wrong, but I don't think it would simply glitch out for either of you.