Injector Questions. Is CC/min variance normal between Injectors of a set?

[Sleepr DSM]

I bought a set of used Nippon/Denso Injectors off the trader. They were advertised as 660’s. I sent them to be cleaned at RC engineering. (injector specialists)
They came back cleaned and tested with a report and a clean bill of health. Before cleaning their CC/Min was 702, 680, 668, and 706 on 1, 2, 3, and 4. After cleaning their CC/min is 710, 694, 696, and 712 on 1,2,3 and 4. These look like identical injectors, (all the same) their spray pattern after cleaning is listed as excellent.

Why is there such a variance in the CC per minute? Is that normal? Will it do any harm?
Their average cc/min is 703. Does this mean that I actually have 700 cc injectors? Would it be most accurate to say that at least?

 

[pneumo]

There is always some variance between injectors, but yours seems to have more variance than normal. I'd be worried about running rich in one cylinder and lean in another. When I got new 550 injectors from RC they tested at 553, 550, 549, and 552, which is really close.