Have yet to see an LRX fail to expand similarly to a TTSX at ranges out to 300+ yards on game, even when started at muzzle velocities down to 2750 fps.

Might also comment that shooting water jugs is the least realistic of the many kinds of "test media" I've used. Which is why I haven't done it for years,

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck