Variable results ... gun to gun.
I have owned a LOT of .44 magnum revolvers ... mid 30s, maybe 40 ... since the 1980s. I do pretty extensive load testing with each. At the moment, my two .44s have been with me a while and I've settled on a load that works in both of them as it worked in a couple of their predecessors. One .44 I owned from the early 90s 'til about 4-5 years ago was very fussy. It would not shoot well with standard LP primers or the hot WLP primer (which is really a magnum primer), it required the Fed 155s or CCI 350s. I couldn't tell you why, only that accuracy suffered badly if I went away from those two.
I think you have to fuss around and see what your gun likes. Rule of thumb is too often rule of wrong. You can waste a lot of components being stubborn.
Tom
