there is no such thing as rimfire scope, it's just brand marketing strategy.
30mm is very common, 34mm is not uncommon on rimfire either.
fyi, I have nightforce nx8 4-32 (30mm) on Vudoo, and a Minox ZP5 5-25 (34mm) on RimX, and a Athlon Midas Tac HD 6-24 (30mm) on CZ457. Their parallax can be down to 10 or 20 yards.
I like FFP on rimfire though
if you are sure you will never reach beyond 100 yards, then find a 30mm with magnification up to 20x and ffp, such as nightforce nx8 2.5-20, compact, high quality glass, ruggedized and not crazily expensive. Or more economically get an Athlon Midas Tac HD 4-16 also 30mm tube with only half the price of Nightforce but very good quality and value.