No - I do not think a 148gr. WC will shoot well in a .36 round ball rifle. It is too long and requires a fast rifling twist to be stable.
The flat nose will cause trouble as well. I used for those shooting gophers South of Moosejaw in another lifetime but would never
consider trying one on deer. I know for sure, though, the 128gr. .36 TC Maxiball will shoot quite well in the 48" twist Seneca rifle they
made. How it would work as a primary projectile for deer, I do not know. As I've noted in other places, I used my wife's Seneca .36
with that maxiball to finish off a deer. If I were to guess, I'd say the bullet penetrated about 16 to 18" from where it entered the neck,
to where it stopped in the spine between the shoulders. It was a downward shot aimed at it's head. It threw it's head up just as I fired
with the bullet impacting back of the jaw and running down the neck beside the spine until it hit the bend up between the shoulder blades
then broke into the spine and stopped in the cord. Seems to me, my wife used to shoot about 50gr. 3F with that bullet.