Hi jpsaur88.
I hear your pain having recently experienced the same with my 300Win Mag. A lot of frustration, wasted time at the range and money spent on projectiles that you just can't easily purchase trying to work it all out.
Before I go into that story, I will give you my experiences with the 30-06 Barnes 150gn TTSX combination.
The load I settled on was
Barnes 150gn TTSX
59.6 gns AR2209
COAL 85.00 mm
Lapua Cases
Cases prepped and trimmed to 61.10 mm
Federal Large Rifle Match Primers
It was a load recommended by my mate using his Mauser 18. He claimed great accuracy with it. I then tried it in 3 different sauer 100's.
In my Sauer 100 Stainless - it shot 0.6 MOA.
In my Sauer 100 Cherokee - it shot just under 1 MOA
In my Sauer 100 XT - it shot approx. 0.75 MOA.
All these were 3 shots at 100.
In all 3 rifles - no pressure signs. No flattened primers, extractor marks on the cases or sticky bolts. (just don't ask me why I need 3 x Sauers in 30-06
I am currently playing around with some 130 gns Barnes TTSX but don't have anything to share.
Though I know you are not interested in the 30-06 Barnes 168gns combination, just to put it out there in case someone else is interested - I have settled on a load for it in my Sauer 100 Cherokee as it shoots tighter than the 150gns and works well on the sambar when the distances are much closer. ( I dual load this rifle for short range <200 yards and a separate 208gn ELD-M for long range)
Barnes 168gn TTSX
57.5 gns AR2209
COAL 82.3 mm (shorter than the 150gn)
Winchester Cases
Cases prepped and trimmed to 61.10 mm
Federal Large Rifle Match Primers
0.8 MOA - 3 shot group.
Again - no pressure signs in any the Sauers.
Unlike the 150gns which started as a recommended load - this load was worked up properly. The intent was to get something as fast as possible and fairly accurate given its not intended as a long-range load.
Where I really felt your pain was trying to work up a 300 Win mag load using the 168gns Barnes TTSX. Barnes reloading data and ADI are vastly different. Barnes had a max load of 79.9 gns AR2213SC
"equivalent" and ADI have it as 75.5 gns AR2213SC for the HDY BTHP. Thats a 4.4 gn difference and not in the direction I would have expected. After going back and forth, second guessing myself, I settled that the 79.9 gns Barnes max load. I worked it up to 79.9gn slowly, it was the most accurate and it did not display any pressure signs.
A mate ran this load through the Quick load software and though it wasn't the exact combination (doesn't list the 168gn TTSX only the 165 gn TTSX) it is hitting just over 65,000 psi.
With this load I am still sleeping at night. My rationale is, its listed as the max in the Barnes reloading data. (I would like to think they know their bullets). ADI powder equivalent site - says that the burning rates of the two powders are equivalent. Most importantly I am not getting any pressure signs in my rifle having worked it up slowly, and I know I will not be using this rifle anywhere else apart from the Victorian high country in winter, so don't need to worry about hot temperatures.
Hope that helps.