The table-toppers thumped Mountain Ash 53-12 and received even more good news on their return to the clubrooms, with nearest rivals Newport Saracens losing 24-17 at Abercynon.
Howells scored two tries and kicked six goals as Bargoed taught Mountain Ash a lesson in running rugby. Centre Darren Humphreys also scored a brace of tries.
Abercynon wingers Gareth Davies and Lyndon Lewis scored crucial tries in their win over Saracens, who now trail Bargoed by three points, having played two more matches than the leaders. Cellar dwellers Brynmawr stormed back from being 19-3 down against Rhydyfelin, but ran out of time as they lost 33-27 - their 20th straight defeat of the season.
In a weather-hit round of Division 3 East matches, leaders Abergavenny look assured of the silverware at the end of the season after a hard-fought 15-5 win over second-placed Pontypool United. The victory - on the back of tries to winger Gareth Hughes-Jones and prop Matthew Price - gives Abervagenny a 12-point lead at the top, with only seven rounds left.
Llanishen scrum-half Owen Jenkins scored a try and kicked six goals as his club returned from Senghenydd with an impressive 30-21 win.
Treherbert's hopes of staying in touch with Division 3 South-East leaders Ynysybwl took a battering when they surprisingly lost 13-0 at Aberdare. Ynysybwl continued a fine season with a 26-12 victory over Ruthin.
In Division 4 East, Chepstow upset Cardiff HSOB 21-18, with tries to winger Carl Rodgers, hooker Matthew Gore and full-back Neil Evans, while third-placed Newport HSOB mauled bottom side Oakdale 43-5.
Division 4 South-East leaders Penallta are close to sealing the title after their 27-7 home win over Cilfynedd. Second-placed Penarth beat Cowbridge 30-27 in a thriller, but Penallta look to have too many games in hand to be deprived of the League title.
At the other end of the table, Penygraig picked up their fourth win of the season - a 40-0 hiding over winless Dinas Powys.
Machen's march to the Division 5 East title stumbled when they suffered their first League loss of the season on Saturday - a 21-13 reverse at home to second-placed Blaenavon. Visiting full-back Morgan Parry was the star of the show, scoring both his side's tries and kicking four goals to bag all 21 points.
Division 5 South-East champions-elect Porth showed why they already have the silverware in the bag with a 47-10 hammering of nearest rivals Bridgend Sports. Porth are now 14 points clear, with only one match remaining.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.
Wales Sevens head coach Gareth Williams looks back on the Rio Sevens success where he helped GB win silver. He believes the successful campaign is a huge boost to his Welsh squad as they prepare for another World Series, as WRU TV's Graeme Gillespie discovers
British and Irish Lions head coach Warren Gatland will be heading back home to take on the All Blacks next year where for him, success for 2017 is all about going to New Zealand and winning a Test Series.
Last week all roads led to Eugene Cross Park where defending champions Ebbw Vale hosted this season's launch of the Principality Premiership. WRU TV's Graeme Gillespie was there to capture the thoughts of Damien Hudd, captain of Ebbw Vale, and WRU Head of Performance, Geraint John.
Llandovery made it three in a row when they defeated Aberavon in the final of the National Foster's 7s at BT Sport Cardiff Arms Park on Sunday. On another eventful day of sevens, Newport claimed the Plate and the Dragons won the women's crown
Last week saw Cardiff welcome players from around the world for the 21st Golden Oldies Festival. The tournament features players over 35 years of age, and this year's event saw a select few represent the WRU in a 'friendly' against the Wooden Spoon.
Wales Under 18 captain Callum Bradbury is delighted to have seen his side claim a narrow 18-17 victory against a strong SA Schools 'A' side to end the three-match Under 19 International Series in South Africa on a high note.
The Wales U18 squad spent an emotional day in the drug-riddled townnship of Hout Bay. Hout Bay Warriors President Fred Johannes said the visit was 'the talk of the town' and will dream about the day everyday for the rest of his life.
RGC 1404's new head coach Mark Jones is hoping to build 'something special' in north Wales and is already looking forward to the development region participating in the Principality Premiership for the very first time.