Really, the situation with Alexander is even worse. In the spring of 2011 they went to what is termed a Type II bolt, a .010 headspace clearence by recessing the bolt face itself. Les Bear and Model 1 remained with the Type I bolt face, the traditional .003 clearance.
The Lee Dies, bless theiir hearts call their dies Alexander Arms Dies and with my Model one I had multiple problems with them not feeding properly, they would stick just before locking up the bolt with a light buffer/spring in sub sonic. I noted on the Grendel Forum some discussion of this with the admonition that it appeared to take Redding dies to fix the problem, so I switched and bang, problem solved. It appears to me that Redding sizes to the type I bolt while Lee sizes to the Type II bolt.
Now Alexander claims credit for the round, but he and "Pesquali" never had a round that worked, if what I read is true. It was Arne Brennin that told Woody at Lothar walther about his 6.5 that worked and Woody put Arne in touch with Alexander. Alexander promptly took Arne's design/data and made the 6.5 Grendel that then worked. Sounds a lot like Bill Gates and Steve Jobs in my opinion.
If you read the data on Beyond 5.56.com and the 6.5 Grendel forum you will get pretty much the whole picture.
By the by on the 6mm Grendel, it is OK, but one thing the 6mm will not do is throw a 160gr bullet and the 6.5 Grendel in whatever configuration, will do so. The 6.5 gives you a lot of options Like 3,000 with a 107, 2,700 with a 120 and 1054 with a 160 and a can.
