It doesn't have a section on 45-90 but does have one on 45-70. I've attached a copy. 

Note that the loads are for Dupont, not Hodgdon. In a minute I'll check Lyman's Cast Bullet volume and two of Venturino's books. If I find anything more, I'll send it.

I also shot one of the cases that I messed up the mouth of the case.  I cut off the bad spot and loaded it the same as the other 5.  I used this as a fouler to warm up my barrel.  It was 61 degrees last time and 68 degrees this time.  No matter the powder you use it will get faster when the ambient temperature  gets hotter.  Some powders are more stable than others.  None are perfect.  A chronograph will prove that. 

All cases were loaded with 31.5 grs. of IMR 4198. 

Fouler - 1,473 Fps.

1 -        1,485 Fps.

2 -        1,454 Fps.  Did show the extractor marks. 

3 -        1,536 Fps.   

4 -        1,503 Fps.

5-         1,493 Fps   Did show the extractor marks. 

I used the wad and toilet paper as before to keep the powder at the primer as best I could.  Here is a picture of a case, card and what is left of one piece of toilet paper. After rolling and sliding the TP into the case I cut off the excess.  As you can see the card is way smaller in diameter compared to the ID of the case where the powder is and the same for the toilet paper.  I am not trying to fill the case, just putting together a column that keeps the powder put. 

Especially in the African or W. Texas sun...

I have used the same 33-34 grs of 3031 with my 1954 99 EG. Accurate.

Nosler recommends 35 grs of 4895 for just over 3000 fps at 3020.

I am working also with the newer Accurate LT 30.

Its not necessary to push the 250-3000 too hard in the Savage 99. 3K is plenty enough for coyotes and Arizona whitetails.

Ridge 

Of course, if you've worked up as you should,  you'll reach Z by titrating up to it and won't have to fire any blue pills that test your rifle's bolt strength. 

One African PH, discussing dangerous game cartridges, said he would trade some velocity for easy bolt lift. 

Most amusing part of the article is that Waters' 250 Savage project started out because of poor accuracy and he blamed the existing barrel. After a difficult barrel change it was discovered that the poor accuracy was due to the scope mount. I don't think his data are going to help Zeb much as the 1903 rifle had very little in common with Zeb's 99. I believe the barrel was shorter as well. The fact that he arrived at a very similar load to your load is actually quite remarkable.

Mike

I now have 10.5 lbs. of IMR 4198 and 2 lbs. of H4198 and should be set for at least the next several years of reloading and shooting.  Time to get busy reloading another 500-rounds of 222 Rem Mag.

Bert

I loaded up a ladder with Olin 760 ball and the lowest rung locked the bolt up to where I bruised my hand hammering to open it. Flattened, extruded primer and impressive recoil. 

After that I became much more cautious about chamber dimensions and OAL. 

I just enjoyed Ken Waters' August 1995 article on the 250 Savage. His max load for an 87gr Sierra using IMR 3031 is 34grs (lining up nicely with Bo's experience) but he cautioned that his max loads were developed for a custom 1903 in a Mannlicher stock. He cautioned against using them in a lever gun so your plan to work up to 34 grains is sound, as always. Unless you have some VV N135 or RL-15 lying around the IMR 3031 seems to be a good choice. I don't know if you have Waters' Pet Loads in your library, the article made for interesting reading but I wish he had stumbled across a nice 99 to test loads in as I had no experience with this or any quarter bore. Let me know if you can't find his article, looking forward to spotting for you when you shoot this little rifle. 

Mike

Bill