I just got a chance to test out some advice from 44Man, using standard primers with 44 mag loads and H110 behind 300 grain HPGC boolits.
Well the results were good, the group dropped almost in half, the load was stiff and I will not list it because of that. But all six shots under .800" at 25 yards. I was herkin and jerkin a bit on the trigger on a couple shots, 5 shots were less than .625" and I am sure if I was not in such a hurry because the range was swamped today, things would have been better. I will go back and try again at 50 yards with several groups with loads reduced .5 grains at a time.
I will next have to try the Hornady titanium nitride New Dimension sizing and expander die.
Don't mean to puff your head up to big but I have to let you know my results.