What's Standard Gross Profit for Your Industry?

I once listened to Tom Reber preach about 50% gross profit and how if you aren't aiming for that, you are going to hurt yourself short/ longer term. He was basically saying, for every dollar you make, you need to make two. This has been super impactful for me and my business but I'm noticing on my really big projects, it's so hard to keep that. I have one $120k exterior BBQ that has definitely had some inefficiencies but we are probably looking at 35% end of day. But that's 35% of a large $$ so that is kind of ok. 

For those of you who do a good job tracking this (btw Jobber's gross profit calculator is objectively amazing for this btw)- what is your gross profit and what do you usually shoot for?