I'm in the process of building a ham'r. from what I can tell, 6.8 is not dead, but it's in the nursing home. There is more support form the 6.8, but I do think the ham'r will gain traction while the 6.8 will lose it. There is only a fraction of the people making barrels and parts for it now than there was 10 years. ago. Wilson and shaw are the only guys making ham'r barrels right now. Wilson and sig are making ammo. starline makes brass if you don't want to make your own.
I have a thread in the reloading section about my journey making brass. I'm building an SBR, but mostly because I wants a compact package in the ATV, and a 16" barrel + suppressor gets long. I do think a 12" grendel would be a better all round gun. But I already had a 16" grendel.
hard to find any of the recommended ham'r bullets in stock. I think I'm going to try the 125 TNT's. they're cheap.
a local guy who hunts a lot of pigs was telling me that he has dumped his 6.8 in favor of the ham'r. He says it kills more effectively. But he has killed a pile of pigs with the 6.8. it is no slouch. His buddy uses a 12" grendel with the 90grn tnt's.