It is designed to lose some lead to create tissue damage. Weight retention is a bit confusing. Some people believe 100% weight retention is the key, but it isn't. Partitions typically will retain 60-70%. AccuBonds will retain about the same. When bones are hit you can expect a little less weight retention.
There are some posts on there that claim they wouldn't shoot bigger game with an AccuBond, but our own personal experiences and 1,000's of calls, letters, emails and people coming by our booth at trade shows beg to differ.
Whether you like AccuBond or not, it is a great real life experiment!