IMHO,
Q1: No
Q2: Yes

Weeks off work, thousand(s) in expense, hundreds/thousands of miles of travel, hard work, harsh conditions and cheap cartridges/bullets for use at "showtime"? Hey, it's up to you. Personally I use a quality bullet for elk, a nosler partition or better. Good choice on the 180 grainers though. Don't know much about Ultras, hopefully an improvement over the plain jane CoreLokts.

Good Luck and Good Hunting,
EKM