See ladder stocking of HSB into existing LMB population.
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=347977&page=1Assume you saw the mortality rates for stocking into a LMB pond.
Here is the data and the lost long Bruce/George HSB thread with ladder stocking.
Bruce :
I'd estimate risk of predation from largemouth as follows:
5 inch wiper--80% over one year in presence of LMB
6 inch wiper--65% over one year in presence of LMB
7 inch wiper--45% over one year in presence of LMB
8 inch wiper--15% over one year in presence of LMB
9 inch wiper--negligible mortality.
Your loss rates would IMO be much lower if all you have is larger adult HSB.