As others have previously noted, 180gr monolithic's are too long and heavy(slow) for the .308win, follow the Barnes guide where you drop your bullet weight class 1 or 2 times your typical choice for class of game, they have no problem staying together and penetrating like crazy(make sure there's no other game behind it) monolithic's need velocity to perform on game , and they prefer alot of bullet jump (and need a longer running start) to prevent steep pressure spikes , it's all in Barne's reloading manuals, My factory Ruger'merican 22" barrel likes handloads with the older Hornady Gmx, 165 grain and 2000-MR powder, this combination has taken 2 Kalifornia Blacktail bucks@57/102yds, 2 wild boar hogs under 30yds, head shots, 1 Montana White tail buck, hit twice1@7yds broadside thru. the lungs/ribs turned 90 degrees and ran straight away from me at full speed then stopped and started to waver 2nd shot@204yds raking forward thru. severing ribs on his right side then out the front of the shoulder(lost some meat), dropped like a stone, 1 Wyoming Pronghorn buck 324yds, touched the bottom of the spine thru. the lungs dropped dead, none of the above bullets were recovered all passed thru. After opening up, destroyed lungs, and chest cavities filled with blood.
I have shot both the gmx and barnes 150's, they shoot flatter but not nearly as accurate, In my .270win it loves both 130gr gmx's and Barnes130gr ttsx, fast. These are the only 2 calibers of monoliths I've tried so far, have a handful more waiting for their opportunity.