Never heard of it?...hmm. When the 284 Win came out in 1963 guys like Bob Hutton went nuts necking the case up and down. The 6mm-284 became one of the favorites early on, then in recent years the 6.5-284 became popular. I have burned out a few barrels in 6mm-284.
Quite a few years ago I discovered that Retumbo worked okay with the 115s. DTACs but nothing that accurate. I blame the bullet not the powder. I switched to the 107 Sierra then to the 105 Berger hybrid when they came out. It was a year or so later I burned out the 30" #7 profile 1 in 7.5 twist bartlein at 1100 rounds so I retired the barrel. If there is a lesson to learn, don't try too many bullet/powder combinations. If you find one that works, stick with it.
When I tried the 115 DTACs it was so long ago that RL-33 was available. Today if I were going to work with the 115s I would try RL-33, which is slower than Retumbo. I found that the mid range load for Retumbo works as a good starting point for RL-33.
I am about to make another 6-284. This time I will use 108 hybrid hunters and RL-33.