Couple of things in LR...
In 'develop' mode... make sure you understand the 'soft-proofing' switch in the lower left corner, relative to exposure and contrast. You can also adjust the background settings.
In 'Print' mode, the last lower right panel has 'Color Management'...
make sure the correct printer profile is selected, if 'managed by printer' is selected
ticking the 'print adjustment' box opens the dialogue for 'brightness and contrast'...
the defaults are ---0---
do a test for your printer, one at --0-- and maybe one or two with extremes at --+100-- just to see what/how it affects the range on your printer...
Remember... if you haven't calibrated your monitor, and done some testing with your printer/monitor...what you see won't necessarily be what you get...
For outside printing I'm another satisfied Nations Printing customer...