Hi, Farsight001,
In looking at OSAS as an argument from the Protestant Revolt,
Maybe looking at the a little more of the context that gave us Romans would be helpful. It is really a major mistake to divorce the writer of any Epistle from the priary group that he intended this letter. Whie we can surely profit from these writings today, to ignore what was going on in the various churches is going to hinder plain understanding.
For me, the death knell of OSAS is found in Romans 2:25-29. The Jews thought they were saved once they were circumcised. Paul points out this delusion in the beginning of Chapter 2 - the Jews are guilty of every sin and their circumcision means nothing - especially when compared to the un-circumcised keeping the law!

Here is the verse:
** 25 Circumcision, to be sure, has value if you observe the law; but if you break the law, your circumcision has become uncircumcision. 26Again, if an uncircumcised man keeps the precepts of the law, will he not be considered circumcised? 27Indeed, those who are physically uncircumcised but carry out the law will pass judgment on you, with your written law and circumcision, who break the law. 28One is not a Jew outwardly. True circumcision is not outward, in the flesh. 29Rather, one is a Jew inwardly, and circumcision is of the heart, in the spirit, not the letter; his praise is not from human beings but from God.
**
Needless to say, calling this Jewish version of OSAS (being circumcised is being saved) a false doctrine must have come as a major shock to the Jews! It was no less shocking to those who once claimed OSAS - like those who have swum the Tiber - and see it for what it is and for what Paul condemned in the Jews.
God bless
Even Romans 3:23 doesn’t mean “all”. So you’re right AND shooting yourself in the foot at the same time. Look at the context. Paul is berating a specific group of people for being vain and foolish in the faith and telling THEM SPECIFICALLY that all OF THEM have sinned.