I gave this combo a different thought & immediately came up with 1894 Marlin & S&W Mod. 29..both in 44 mag.
Not my choices if I could have just one rifle / handgun.. have to give it some further thought.
Would I be staying in one spot ? ( like my home) , or would I be traveling ? It would make a difference.
Staying in one spot, I'd chose an AR-10, but if walking / moving I'd choose an ar-15 ,
( probably in 7.62 x 39 ) for the lighter weight of both rifle & ammo.
Same with handgun. Stayin in place ? a 1911 in 45, most likely.. maybe 10mm, if I've got access to my reloading stuff
On the move, a 9mm, either Bul 1911, maybe a dbl stack in 9mm