As a general comment, I usually reach book velocity with lesser charges than stated in the manual when loading TTSX’s in several weights and cartridges. Like Mule Deer’s advice, I pay more attention to velocity over the chronograph more than visual signs, not that they are ignored. I load the 168 TTSX in my ‘06 over Big Game a bit over 2,800 fps. If I want to launch a 168 TTSX faster, I shoulder my .300 Weatherby and sent it 3,300 fps. I see nothing wrong with LC or any other brass as long as weight/volume is consistent. After all, deer never inspect the headstamp. Happy Trails
PS, I would also look at Barnes manual data online for the Barnes bullets being used to decide what your velocity range should be and check those numbers against other manuals for a sanity check.
Necromancing this thread as I'm getting ready to do load development for my '06 with 165 grain Barnes TSX.
Looking at their load data, they show a *max* charge of 55.5 grains of H4350. Poking around though, there seems to be a pretty solid consensus that 57-59 grains is a sweet spot for the .30-06 shooting 165 grain TSXs. Is Barnes load data really that conservative or am I missing something?