IMO There are alot better options than hsm. I have had hsm give pressure signs and stuck bolts on three different rifles. I quit using them for anything. 162-168 are the heaviest I would consider running. Velocity loss with the 180 class of bullets will be pretty dramatic. As stated copper creek, unknown may be your best option when instock. Unknown lists the 162 at 2670 fps. Whereas the 140 is listed at 2830 fps. They don’t currently have a listing for a 180 class bullet in that caliber. Best of luck with your quest.