If you haven't already, check out Kylie's Guide to Espresso
When I first starting making coffee for a specialty roastery 7 years ago, brew ratios weren’t something that were discussed. Dialing in felt... chaotic. The perfect dial-in could be anywhere. After several shots, I’d be over-caffeinated, tasting every possibility with a line out of the cafe door. It was not efficient.
I’m not saying you shouldn’t try everything because maybe you’ll find a different brew ratio that works best for you. I’m saying this espresso guide is a map with a short cut given to you!
I believe this as a standard for dialing in coffee works best because it allows you to make small adjustments and work out your espresso dial-in very easily. Pick a brew ratio, go from there and all you need to worry about is the grind setting of your espresso. I use these specifications because it offers consistency with all coffees with varying roasting profiles. With this guide, you too can reap the benefits of consistency.