And what, precisely, happened in that timeframe? That was during the persecution of the church under the Caesars; Constantine didn't come on the scene until 313.
Basically, your argument is that calling what the Apostles did "Mass" gets in the way of your history, which is -- to be frank -- a made-up convenient fiction to legitimize your own theological position.
You can't point to any substantive difference between what the Apostles did and the Mass, because there isn't any.
To draw your focus to truth, I ask you to answer the following: does the resurrection body Jesus now has IN HEAVEN use blood to maintain the LIFE of His body? ... We are told that the Life of the creature is in the blood. The blood is not the life, the Life is in the blood. That is, on the creature / carnal level.
You asserted, “You can’t point to any substantive difference between what the Apostles did and the Mass, because there isn’t any.” And with that blatant exhibit of Magic Thinking we see how Catholic Tradition was given equal authority with The Bible ... in 1545AD !
The substantive difference here is that "Mass" didn't exist then... So, by definition, there is NO similarity -- none. Mass is a man-made hokum that claims to re-sacrifice Christ over and over again while denying his scriptural once and for all sacrifice on the cross.
There is nothing fictional about that. However, if you want to bring up theological fiction, we can do so by simply bringing up CCC 841 as promulgated by Roman Catholicism. The CCC is a teaching document. It teaches, in CCC 841, that Catholics and Muslims worship the same "God."
And as we all know, Chistians and Muslims do NOT worship the same God; Christians worship the One, True, Living God; Muslims worship Satan, The Father of Lies.
So...before Catholics start spouting things about fictions and attempts to legitimize theological fictions, they'd be better served determining if their denomination is teaching them to worship Satan by answering this question: is CCC 841 truth (agreeing with Rome), or is it false (denying Rome and agreeing with God).
Hoss