I have had only one failure on bullets in my 6mm, that was with 105 grain Speers. They didn't open up and left pencil holes through the lungs of a Pronghorn. They were however the most accurate bullet in that 6mm.
I think that heavy Partitions are always good in the smaller calibers such as 6mm. If I were to take a 6mm out for deer, I'd use 100 grain Nosler Partitons.
