That's interesting because gold dot was the only one that gave me problems consistently. Had two initial loads jam ad the the 3rd round jammed on loading. 3 jams in 5 clips turned me off.
Not to throw another variable into it, but if you know anymore with a better quality mag, might try running them same HP's though using a different mag...
I'm not too familiar with 1911's, but what little I have seen myself have been mag issues rather than ammo....