I first shot spitzers through my .30/30's back in the '70's. I had a Rem M788 that would shoot sub-moa with 130gr Speer HP's.
I agree that the spitzers offer little improvement. Heck, I even shoot the 63gr Sierra's through my .223's as they are a superior deer bullet, but I digress.
Use the two (3) Speer flat-nose bullets listed. (the 130 fn is the best
)
I in fact easily see 2,400fps with 150's from my .30/30's. However, only 2 powders are capable. Reloader 15 (but not at most recent data maximums) and LeverEvolution aka LVR.
But, again the extra 100-150fps means little.
A well constructed bullet intended for the velocity's of the .30/30 is the key.
Secondly, PROPERLY sighting in the rifle is VERY IMPORTANT
The reason most consider the .30/30 a 100yd gun is because they are conditioned to 100yd zero. I use a +3" zero at 100yds, or a ~160yd zero. This gives the 150-170gr bullets a -4.5" at 200yds which is further than 90% of the 300+ deer I've killed including those shot at airports for population control under permits.
It's the Indian, not the arrow.
My favorite bullets for the .30/30 (aside from the cast bullets I mostly shoot) are the Remington 150 and 170gr CorLokts. They open reliably out to 300yds (with proper bullet placement!) and are usually quite accurate.
Practice, practice, practice. Bullet placement is key.
If you do INSIST on using spitzers, the 125gr Nosler B.T. 110gr Hornady V-max, and 125gr Sierra PtSpt have been the best for me.
Use 37.0gr of RL15 with the bullets seated deep enough to just clear the ejection the chamber on ejection and you're on your way.
Do realize that these are going to shoot ~ 10" differently at 100yds from previous sight-in (poa vs poi) because of different barrel harmonics.
Lately, I just shoot a 160gr FNGC at ~2,000fps. Does everything I need a .30/30 to do.
I read the piece by T.R. back many years ago. Interesting piece.
If you sight in your .30wcf like they did, it's easy!
If you are hitting just above the front bead at 100yd's, you are acutally +3". Hits to the bead at ~175, and at bottom of bead (large as a deer at 300yds) to bottom of the bead. With proper eye glasses (T.R. usually carried 3-4 "spares") you can see the front bead clearly (I use reciever sight).
And I shoot, a LOT...