Did the 45 mag spring 'project' that I brought up in my post #37.
Top row are 6rd mags,center row are 7rd mags,bottom row are 8rd mags. 14 assemblies.
Measured wire size,all appear to be .040". Noted number of coils,only 2 varieties,11 1/2 coils and 13 1/2 coils. Noted free length. Measured spring force,used a fish weight scale from Cabelas,force was measured with the spring in its' empty tube without the follower.
The longer springs(13 1/2 coils) were only in the 6rd mags(CS45 & 4513TSW) and the M945PC(7rd mag & 8rd mag). All other mags had the 11 1/2 coil shorter spring.
Magazine spring buttplate catch were the plastic un-retained for all the 13 1/2 coil springs,metal clipped on spring for all the 11 1/2 coil springs.
Nothing unusual was found in the spring forces,all the 13 1/2 coil springs had similar force even though mag length was different(6,7,8rd),all the 11 1/2 coil springs had similar force even though being used for both 7 and 8rd mags.
Mags were picked up at gun shows so unknown how used/unused they are.
Last edited by oldman10mm; 07-02-2017 at 01:15 PM.
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