All the data I can find seems to be for MAXIMUM velocity.

My goal is minimum recoil, for teaching my 7 year old son, and his mother, to shoot. I would like to duplicate .223 Rem. ballistics, i.e., 55 gr. @ 3100, 70 gr. @ 2700.

Any suggestions ??

Wow, minimum velocity. That really throws a curve.
I load .308 w/sabots for .223 40 grainers. I haven't chrono'd them but they shoot almost like a laser beam.
I don't know what to tell you on a reduced load.Sounds like a good idea though.
There are fella's on this forum that work up(or down) reduced loads.
Try to post over in the reloading thread.
From experience,sabots shoot very well out of a clean barrel.They don't like copper at all.

Yep,

Those plastic Sobots react to copper fouled barels about like lead bullets do-not well..

Clean the bore thoroughly with a good copper solvent before shooting them..

Yea a little off topic here but who sells 30cal / 22cal sabots?

Ye gads, I didn't even know they were still being made. They never made much of an inroad in varmint hunting. I never found them to be very accurate, and they were rather expensive to boot. Best wishes.

Cal - Montreal

Wingnut---I have not used the sabots as I do have .22 cal centerfires. For that reason,I have not even priced them,but would seem to me with wife and son wanting to shoot,it would be better to get a .22 centerfire. I did train my grandson with .22 centerfires and he took his first deer at 9. At 11 I moved him up to .243 and he is 15 now--has gotten 3 this year and has gotten atleast one per year since he was 9. You wont get the ballistics you are looking for,but you will get the reduction in recoil and blast if you go to cast bullets in that 30-06.

sabots for sale= https://www.eabco.com/reload02.html
data= https://www.eabco.com/Reports/report04.html