Surprising to see so few, if any, folks here who have hot-rodded the modern 1895 .45-70.
I haven't shot the BB personally, but I have pushed a lot of 400's and 405's up over 2,000fps over healthy charges of 4198. The recoil is stiff, but it's not as offensive as a .338wm or .416 Rigby. It's powerful, and certainly not a pleasure from the bench, but like most cartridges in this bullet weight and velocity class, the recoil is largely over-rated by those who haven't actually fired them firsthand.
The Buffalo Bore loads were designed with the 1895's in mind. They are very particular about citing which models they have tested and which models are unfit for certain loads. Knowing the thousands of similar loads I have fired from my 1895's in e last ~20yrs, I would not agree with the common sentiment here implying pending damage to your rifle.
Detached retinas do happen with heavy recoiling rifles, but often it's a greater concern for a faster/shorter impulse cartridge than with any of the punkin chunkers.