I find Continentals on Campagnolo Omega rims to be a very tight fit, so I feel your pain. I find tightly fitting road tires to be a general trend, which I ascribe to fear of litigation from beads popping over the tops of rims at inopportune moments.
I watched a local bike shop mechanic teach a flat-fixing clinic, and instead of doing multiple separate bead scoops, as I always have, he set one teflon tire tool down between the tire and rim, scooped the bead over the top of the rim, and then ran that lever around the rim.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069