I have 2 Neerups, both Rhodesian shape and they do a fine job. As has been mentioned, I would try different loading methods, the Frank method works well in a large bowl, good luck!
Recent acquisition, a Guildhall from the 1960's? The stamping is very faint: The Guildhall London pipe, reverse Made in London(in a circle) England, shape 23. Curious about the Sterling Silver mount versus Sterling London. A very good smoker.