G'day. That is exactly how my 45 SWC bullets come out. This means you are not using too much coating.
If you have coating in the groove, you are using too much.
T.C.
It really doesn't matter if the colour is a bit different from one bullet to another, so long as they has the smash test and the coating stays on.
I fire 200 45ACP coated today in both SWC and RN with microgrooves. barrel is clean. push a patch wet with solvent through and the shine in the barrel is blinding.
I do 2 coats at 195Deg C for 10 minutes. pre-warm oven first.