Just dug out my notes on OAL in contact with rifling for my FC 6.5 CM:
127 LRX 2.910"
139 Scenar 2.835"
142 ABLR 2.917"
143 ELD-X 2.877"

Just finished some load work with the 143 ELD-X and RE 16 and 26. 42.5 gr RE 16 is getting around 2750 fps with good accuracy, 46.5 gr RE 26 is getting around 2750 and 47.5 gr is getting 2790 fps (46.5 being slightly more accurate than 47.5). All loads are shooting around 3/4 MOA or better...