Welcome to the campfire, Connor!

You've done pretty well on figuring out what you have. The 1899H was introduced in 1906 and made until 1921 when the 99 models came out. The 1899H became the 99E (solid frame) and 99F Version 1 (takedown). The 22HP came out in 1911 and was a necked down 25-35. It was oversold by Savage as a big game cartridge, when it really performs best as a varmint or coyote type gun. The 22HP from 1911 to early 1921 was only sold in the takedown version of the model 1899H, and that combination was marketed as "The Imp". The 22HP continued to be sold up to 1940 in several models.

Before WWI the receiver finish would have been a dark, mirror blue. After WWI it was like yours, more of a standard matte bluing. Also before WWI the buttstock would have been a perchbelly, and after WWI the bottom of the buttstock was straightened out. The 1899H up to 1920 or so had a hollowed out buttstock to lighten it's weight, as well as a featherweight profile barrel.

“The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at www.savagelevers.com