Bottle carbonation light after 20 days?

Brewing Processes
1

Its been 20 days since bottling and I would prefer a bit more carbonation.  Will more time help or should I just chill it and drink it as is?

It’s a brown ale.  I used 145 grams of corn sugar in 5.25 gals of beer. I’ve kept the bottles at about 73 F and shaken them every two or three days.

Thanks in advance for your help.

2

You used an ounce per gallon. Should be pretty carbonated at that amount. Give it some more time

3

Agreed.  That amount of sugar will carbonate your batch.  Give it another week and test again.