Agree with Jill, there are no bulls that there are no throw aways. Your best chances of attaining no throw aways would be ET- recips, but even then, not possible. If you could get 50%, I would say that you were doing the impossible and I don't know of anyone personally that can get that done. Sunseeker will be way more predictable than Paddy in what I have seen, and should work well on the Simi cross cows. The Sunseeker's in general are looking to have good maternal quality for a clubbie bull.