Well I made a stupid mistake. I cleaned my aks after a range trip. I had them marked to the rifles. I have 762,556,545. Unfortunately the marks came off when I scrubbed them clean. I can't really tell which ones are which. 
So what are the differences in spring weight between the calibers? I'm struggling to find any info on this subject.
So what are the differences in spring weight between the calibers? I'm struggling to find any info on this subject.