Many that RC's lump together as "Protestant " are actually shades of Catholicism
Arminism is on such. the Wesleyan branch of Arminism would agree with you on the ability to lose your salvation
The P in tulip simply expresses that God has the desire and ability to preseve those that are his with His grace..I do not think you would say that God does not give grace to keep those that are His kids would you?
"But in order to legitimize his heresy, Calvin had to present his new teaching as something ancient. Therefore, he appealed to the authority of St. Augustine. But Augustine, "the Doctor of Grace," was in no way a Calvinist, for in one sentence, he rejects TULIP: "If, however, being already regenerate and justified, he relapses of his own will into an evil life, assuredly he cannot say, `I have not received,' because of his own free choice to evil he has lost the grace of God, that he had received."