I always laugh with my friends whenever Wolverine loses his memories. Fire an Adamantium bullet on his head or blow out his body.. He loses his memories & start gaining it over time.
I want to know how many times he has suffered this loss.
Wolverine has had his memories manipulated so many times its hard to keep track which is really memory loss and not just normal manipulation. But I believe the total number is around 4 or 5 for actual memory loss and another 10 or so for memory manipulation.
The following article from the marvel Wiki does not give issues specified but would imagine most of the first memory losses mentioned should be covered by Wolverine: Origins.