Nope.  They do mean using the actual railgun round in artillery.  Different sabot, obviously.

Text indicates the round is/will be GPS guided.

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While slower than a railgun, a powder-fired railgun projectile still flies at 2,800 miles an hour, which extends the range and power of existing weapons.

At Dalhgren last year, military engineers test-fired 5- and 6-inch Navy guns loaded with a version of the railgun projectile. The range of the Navy’s 6-inch guns was extended to 38 miles from 15 miles.

The Pentagon also tested the railgun projectile in 155mm Army howitzers, successfully extending its range.

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"Any sufficiently advanced parody is indistinguishable from a genuine kook." -Alan Morgan