I'm working on a Mini Bertha (not the Baby B.) and the downloaded instructions call for a BNC-20L. The BNC-20L is fairly blunt, but it does come to a point, similar to a Civil War mini-ball. It's actually more pointy looking in person than the shadowed Semroc line art. The Estes catalog model is more rounded, almost like the BNC-20B in the old 70's catalogs. I think the nosecone looks more round when actually looking at my 1979 catalog than it does when looking at the 1979 scan from Ninfinger....I guess I'm nuts cause it should be the same image. Does anybody remember getting a Mini Bertha with a more pointy nosecone than rounded?


Semroc BNC-20L


1973 Catalog Model (first appearance), which does seem a bit more pointy than later catalog images, possibly due to lighting.


1979 Catalog Model