The pressure is on Newbridge at the top of Division One East as Blackwood and Merthyr, who both have games in hand on the leaders, scored 19 tries during impressive wins.
Blackwood was buzzing after the second place side thrashed Beddau 71-10. Brothers David and Trevor James both scored a pair of tries each from the wing, with centre Gareth Price, who also notched a brace, among six other try scorers.
Club spokesman Lyn Hall said: "The win was our biggest since beating Tondu 86-7 six years ago and the way in which we got it was superb. We are playing a very attractive style of rugby that everyone enjoys watching."
Merthyr also piled on the points as they pummelled Penallta 52-7. Dan Hitchens scored two of the Ironmen's eight tries.
But Newbridge stay on top of the table after an 18-12 win at Rumney, with Gary Wilks and Ross Coombs scoring tries for the visitors.
Caerphilly fell off the pace at the top as they lost at Llanharan 39-11. Ystrad Rhondda beat Newport Saracens 16-5 while the students from UWIC beat Bargoed 34-24.
An Anthony Evans hat-trick helped Carmarthen Quins on their way to a 14th straight win as they beat Felinfoel 54-21 to stay top of the Division One West table. Neil Wilcox, Jason Harries and Martin Morgan claimed the other tries for 'Quins who now look certainties for the league titl.
Narberth remain head of the chasing pack with a 16-6 win over Maesteg thanks to tries from Steve Martin and Jonathan Morgan.
Fellow high-flyers Tonmawr suffered a shock 34-5 defeat at the hands of strugglers Bonymaen. Paul Warlow got 19 points from the boot for Bonymaen courtesy of four penalties, two conversions and a drop goal. Nick Harwood, Paul Davis and Jordan Poole got the tries in an outstanding display.
Cwmyllynfell were the big scorers of the day, running in eight tries on course to a 60-12 demolition of bottom side Dunvant. Andy Wilkins was the pick of the scorers with two tries.
Strugglers Llangennech pulled off an upset, beating high-flyers Corus 15-6. Matthew Lemon and Aled Roberts got the tries for the home side in an excellent second half performance. Carmarthen Athletic claimed a 29-18 victory over Whitland.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.