Neil Jenkins scored 23 points as Pontypridd ground out another win to stay on course for a place in the Celtic League quarter-finals.
The Borders outscored their hosts by three tries to one and proved they are getting better with every game, despite the fact they remain winnless in the Celtic League.
"It was a hard earned victory and we didn't really perform. It was disappointing, but at least it was a win," said acting skipper Jon Bryant.
The robust Borders pack drove New Zealand flanker Campbell Feather over the home line for the game's first try in the opening half. That broke the deadlock after Kevin Utterson and Jenkins had swapped early kicks.
In the second half, Scotland and Lions outside half Gregor Townsend ghosted over for a try at the posts, but the ever reliable boot of Jenkins kept his side in contention.
Then some quick thinking from Wales back row man Michael Owen from a five metre penalty earned Ponty a try.Owen caught the Borders defenders napping as he ignored a penalty opportunity for Jenkins and drove over the line.
Jenkins added the wide angled conversion to leave the Scots chasing two scores to win.
In the end, they managed to send international wing Craig Moir racing 30 metres fro a try which Utterson converted with the last kick of the game to ensure a bonus point for the visitors.
Pontypridd lost their international flanker Richard Parks with a facial injury in the second half when he got a finger in his eye.
Scorers: Pontypridd: Try: M Owen; Con: N Jenkins: Pens: N Jenkins 6; DG: N Jenkins. Scottish Borders: Tries: C Feather, G Townsend, C Moir; Cons: K Utterson 3; Pens: K Utterson 2.
Carmarthen Quins are holding an exhibition to commemorate club players who fought in World War I. All welcome to the clubhouse on Friday afternoon to learn more about local history, or share any family anecdotes or artifacts.
Defence coach Shaun Edwards believes Saturday's clash against England - the 'form team in world rugby' - poses a huge challenge for his side but he is confident, with Wales beginning to show the defensive qualities displayed in the last two World Cups,
Women in the Ospreys region recently completed a Level 1 coaching course and are looking forward to putting their theory into practice in clubs and schools across the region. A women only course has been organised for the Scarlets region starting next week, full details at the end of the video.