I am trying to get into hunting 1,000 + yards and have shot animals at 800 yards but am wanting to get a 300 caliber rifle to shoot 1,000+. Really like the senderos but wanted to see what people though of the original sendero in 300 win mag or the newer sendero sfII in 300 RUM. I've read a bunch about how accurate the older senderos were out of the box but haven't seen much on the Ultra Magnum. I would put a brake on both.