I looked in the Lyman 47th for 44mag rifle data and their max 240gr load only made 1779. Was about to say give up when I thought about VitaVuori and went looking for data.
They show a max load of 20.2 N110 under the Hornady 300XTP at 1374fps from a 7" barrel.
Many 44mag loads in the Lyman book picked up 500-550fps going from the 4"pistol to the 20"rifle. It might just be possible to do it!
It will probably be close and the only way to know will be to try some and see. Good luck on the experiment and let us know how it works out.
(Another thought, as what you are asking is a handloading proposition, you might get more info over on the handloading forum)
Edit: Should have probably asked first if you ARE shooting them at 1780 or WANT to shoot them at 1780? If you already have the load to do the deed, please disregard my post.