Humboldt Nutrients Big Up Powder Question

For soil application I've been using H&G's Shooting Powder (0-.9-.20) for weeks 6-7 of flowering
but I have run out of the shooting powder and I have a bunch of free samples
of HN's Big Up (0-.33-.23) so I was wondering if it would be ok to use the Big Up in the beginning
of week 8 of flowering without any ill effects? Also what would be the dosage of big up
at this stage of flower and do I use it alone or can I use it as a additive with my bloom nuets? I appreciate any input you can give me and thanks in advance!

I know this was posted about 12 days ago and i hope ur decission has worked out for u but i use the big up poweder and because of the high P-K i dont use any other bloom boosters, really dont need to but i still add in the base nutrients along with the additives! Hope u get big dense flowers!

0-.33-.23

Rip off unless you mean 0-33-23

Edit: It seems like the OP meant to put 0-33-23, not 0-0.33-0.23. This is a huge difference...