Tom,
Here is a link to the thread on Voldoc's 1032yd PD with a .20BR.
http://forum.accurateshooter.com/index.php?topic=3767164.msg35963565#msg35963565
A fast twist .20 Wasp has close to the same powder capacity. The 55gr Berger has a BC of .381 with a hollow point, wonder what the BC of a 55gr V-Max, NBT or BK would be? The 39gr BK has a better BC at .287 than the 50gr Berger at .281 and you can get a lot more fps with the 39gr. Those numbers are what's listed on their websites.
A .20/30-30AI would be close to a .20-250, good for coyotes and such, maybe a bit much for a PD or ground squirrel shooting. I really like the capacity of my .204 Wasp, a little more than a .204 Ruger, close to a .20BR. I've actually backed off to about 3950fps for my PD load with the 39gr BK. I've had it up to 4150fps without pressure signs. I bought 500 32gr Zombies a while back. Going to try to find a .20VT type load for the close shots. Maybe extend my barrel life with the light load and the were cheap. Here's a couple more pics.
L to R My rifles and ammo right before I left for Montana last June.
No.3 .223, bought it at a gunshow a year ago, needs a new barrel.
No.1 .219 DW PDK, Shilen 14"tw, 8-32X40 Bushnell 4200
No.3 " , Shilen 8"tw, 6.5-20x40 Leopold
No.3 .204 Wasp, Krieger 11" tw, 6-24x42 Sightron SII Big Sky
No.1 " , Pacnor 11" tw, 6.5-20x40 Leopold
They all have Kepplinger set triggers, The scope on the .223 is a Premier Reticle 18-40 that I had just bought and wanted to see how it would do out on the prairie.
The dogs were pretty skittish at this town, shot a few under 200yds with the .223 when we first got there, then it was the No.3 .204 on dogs 3-400yds to the left and the No.3 .219DW PDK with 75gr A-Max on the dogs 5-600yds on the other side of the pond. Can't wait to get back out there.
Dave