Re: 30 cal sabots
You may not be able to duplicate the performance of the factory Accelerators, because they use several proprietary components that are uniquely developed for this application, and which are not and never have been available commercially to handloaders.
When Remington developed the round, they had to contract IMR to produce a powder which had a burn rate that was similar to a pistol/shotgun powder, but also had the higher density of a rifle powder. They had to use all of the case capacity of the .30-'06 case to contain the charge required to reach 4000fps. This propellent has never been made commercially available to handloaders, and no commercial propellent has both the burn rate and density required to duplicate its performance.
The bullet may appear conventional, but it is not. Remington determined that the bullet core hardeness required was <span style="font-style: italic">much</span> harder than readily available commercial bullets. You would probably have to use some sort of Barnes-solid-like bullet to duplicate the required hardness. The conventional bullets would hold up, but only the harder bullets would hold the accuracy standard they wanted.
Additionally, they discovered that conventional primers were too powerful. The coefficient of friction that the sabot provided was inadequate to contain the ignition pressure, and the charges would not ignite properly or consistently. They had to develop a special primer with a reduced charge, and neither this primer, nor any like it, have ever been made commecially available to handloaders.
Any efforts to duplicate such performance are doomed from the start. It may or may not be safe to forge on and try to force the available components to deliver what they really can't do.
Combine this with the fact that even the specially developed factory cartridges never really did deliver accuracy that should have appealed to their most likely market, varmint shooters, and you have a cartridge which is basically an answer in search of a question.
This info comes directly from <span style="font-style: italic">Cartridges of the World</span> eighth edition, 1997, by McPherson, editing and adding to the work of Barnes.
I'd beg off from this experiment.
Greg