fnbrowning,
In answer to your question, "What would be the most accurate, flatest shooting, paper punching load for the .30-30?", I would say that the flatest (fastest) may not be the most accurate. Also, pointed bullets do not guarantee accuracy.
With regards to the flatest shooting bullet in the .30-30, in 1922, Rem-Umc introduced a 110 gr. High Speed Mushroom (Hollow Point) loading for the .30-30. This bullet had a .12" flat on the hollow point and was safe in tubular magazines. (If you lay .30-30 cartridges end to end on a table, you will see that the bullet nose rests mostly on the base of the cartridge in front of it and not the primer.) Advertised velocity was 2,720 f.p.s.
Today, handloaders can replicate this ammunition using Sierra's 110 gr. hollow point bullet. In the 26" barrel of my 1894-1994 Winchester Commemorative rifle, this bullet over 38 grs. of H335 powder sparked by a WLR primer clocks 2,857 f.p.s. (Maximum load from Hodgdon's manual but with a 125gr. bullet ) Not bad for a .30-30!!
Accuracy is very good with 3 shot groups in 3/4" to 1 1/4" @ 100 yards using a tang sight on that rifle. It also shoots well at 300 meters (327 yards) on the NRA High Power Steel Javelina. If the sights are on, at the drop of the hammer, in an instant, it's goodby pig!
w30wcf