Are they original double springs? Wonder if there was a difference between PreWW1 and after the war? I doubt my double springs could have compressed an inch? Eddie has a fascinating series of comments in the “Gallery” under BSA resources.Originally Posted by isobar
From the Gallery:
“The top one is a N.O.S. BSA Airsporter which measures 10 1/4" overall, with a wire gauge of 0.127" x 33 coils. The second set are a set of pattern twin springs, in 0.134" wire x 17 coils, these are 10 1/8" long, and were removed from a gun as it was very harsh and over the limit! The third set are a set of original BSA twin springs, these are 0.136" wire x 17 coils , a stiff temper, and are 9 1/4" inches overall..this gives minimal preload, and these springs give mid 11's in energy and are very smooth in operation. You will notice the striking difference in the length between the pattern and genuine twin sets, due to the more open winding...” Eddie
Mine must be orginal as they are identical to the last set in the picture and he says they produce mininimal preload. They are a tighter coil which is not available now. Replacing them with modern springs adds preload to match power? But I think it produces more snap in feel? My choice seemed to be to reduce the preload and power to give me a pleasant feel? But feel is in the hands of the shooter I guess.
My original springs with the broken one pieced together. Same as Eddie’s third set 17 coils with minimal preload?
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