Are tap loaders inheritently less efficient?

[Vic Thompson]

Regarding power of Taploaders : around thirty years ago someone asked me to check the power of a Pre War BSA Underlever in 0.25 cal, according to my equipment it was running at well over 15ftlbs (can't remember the exact figure). Also, from memory I've had early Airsporters (Mk 1 and 2's) that were capable of exceeding 12ftlbs (albeit by not as much as the previous example).

I know little about the design of Airguns but my "Gut Feeling" is that with today's technology an efficient Tap Loader Air Rifle with a 12ftlb capability could readily be designed and made, but the production costs could well make it a non-starter financially.

Vic Thompson.