I think it is a less than ideal choice for a purpose built/purchased rifle to use for bull elk. Will it do it? Yes. Are there far better cartridges, certainly. In fact, I have killed elk with both the 7mm08 and the 260 and prefer the 7mm hands down.
I think the 260 is a very reasonable cartridge for cows and makes a good youth round but it does run short on steam at medium ranges and I wouldn't tout it as a 500 yd elk round. As for using using only cup-core type bullets and shunning premiums, I call BS on that. Have seen too many shot with Partitions to fall for that logic. Partitions work just as well as lower velocities as the core lokts and better at higher velocities.
I don't use mono bullets under 7mm caliber so can't comment on what a TSX would do!
