On the 7 twist AR
7 twist is good, OK.
My best guess that the bullet is damaged and/or cartridge bullet seating is damaged upon stripping the round from magazine to chamber.
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Upon comparing bullet profiles between the 62 ELDVT & 73 ELDM, the 73 that is intended for .223/AR has a longer bearing surface & shorter ogive. The 73 profile would ensure more secure bullet seating for magazine loading.
The 62 ELDVT has a comparatively large void, like empty space instead of lead core as in the 73 ELDM, surrounding the plastic tip making for a less secure attachment. If the plastic tip was bashed out of line upon the chambering process it might affect accuracy. 62 ogive is much longer than the 73.
So - you might try single loading, like using a SLED. If chamber is 5.56 NATO long seated bullets should fit.
Some time ago when I first got my 8 twist AR, I loaded some 53 VMAX bullets wanting to clear bunches of same mound rodents. Single load worked but thru magazine was bad - did not feed, despite fitting in magazine, terrible situation, bolt action much better. I selected the.224 62 grain HpBt from Mid-South for AR use but can't get them now.