Yes it would and that's the point . If you have a bullet that has a length swing difference of .008 and you make all your cartridges the same COAL . You're just making the jump to the lands inconsistent or your cannelure to crimp inconsistent . Which would you rather have . A very consistent COAL or a very consistent jump to the lands ? I know which I prefer .
Although I note what my rifle loads COAL's are , I do not use that measurement in any official way . I set my seating dies ( all micrometers for rifle ) to my intended O-give measurement then check several cartridges to get my avg COAL for my notes .
In this picture you can see I note all three measurements COAL , Comparator measurement (comp ) and my seater die setting
When loading pistol I still use COAL most of the time . I recently had a 45 bullet that was all over the place when measuring COAL so I used a comparator measurement to set up the seating die for that bullet .
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