I also bought a box of '06 Accelerators when they came out. They grouped around 1", but in my free-floated Savage, printed about 6" lower than my normal hunting loads, so I didn't use them.
One day, though, I shot one at a full soup can and the noodles were disintegrated. Pieces of the can were no larger than 1". It was quite a show!!
One woodchuck was killed, but the results were no better than with the 125 grain Sierra handloads I was using. I think the 125s were ahead of 53 grains of IMR 4064 (that was about 40 years ago, so my memory might be off).
Picher