Should be relatively self explanatory; in vanilla, hellstone can be blown up by bombs only in hardmode. However, with cal enabled, bombs can blow up hellstone at any time.
#Hellstone can be blown up by bombs
wanton imp
gaunt gyro
i was about to suggest it
If it's intended, I want to suggest hellstones to be immune against bombs
wanton imp
if it's intended, you make a suggestion 
gaunt gyro
yees
ripe rain
look like this one is finally officially real
gaunt gyro
real?
ripe rain
real
gaunt gyro
ripe rain
lol I never actually tested it out
only know fallen said so and I believed them
meanwhile I don't see anyone else tried this for months
until fluffy made this post I guess
ripe rain
no more fishing
gaunt gyro
yet.
gaunt gyro
it has been a day, time to make the suggestion
young zephyr
it's a bug
gaunt gyro
ah
young zephyr
it's supposed to allow meteorites to be blown up phm instead but the wrong thing got hit
gaunt gyro
rip, hope it's fixed next update
young zephyr
untold marsh
Well done
Execent
Magnificent
gaunt gyro
now you won't be able to bomb hellstone anymore
untold marsh
Good
gaunt gyro
weep, and join me on reaver shark fishing
untold marsh
Nah just left it post evil 1