I want to know the answer to the following question:
What was the practical ceiling of the effective heavy guns?
All the background I'm provided with is that "Of the "heavies", some 200 were of the obsolescent 3 in (76 mm) type; the remainder were the effective 4.5 in (110 mm) and 3.7 in (94 mm) guns, with a theoretical "ceiling"' of over 30,000 ft (9,100 m) but a practical limit of 25,000 ft (7,600 m) because the predictor in use could not accept greater heights.". Is that enough to answer the question?
Answer: yes