Nutty Krust title retained by Dromore
Tries from Joshua Brane, Michael Watson and Simon Henshaw, all converted by outhalf Aaron Atkinson had Dromore 24-0 ahead.
Rainey pulled a score back just before the break with Neil Hastings crossing and Lorcan Quinn converting.
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Hide AdThe second half saw Rainey stage a comeback with talented tighthead prop, Calum Smyth going over twice. Conversions by Quinn brought them within three points.
Rainey dominated those closing stages but Dromore defended stoutly to take the spoils.