Daryl Mitchell and James Vince were in the runs again, while 16 wickets fell on day one between Gloucs and Kent.
Hampshire's James Vince hit his second ton of the season, while Saeed Ajmal made an instant impact for Worcestershire.
James Taylor helped guide the Nottinghamshire Outlaws to a six-wicket win over the Hampshire Royals at Trent Bridge on Tuesday.
Centurions Jimmy Adams and James Vince put on 233 as Hampshire crushed Scotland at the Rose Bowl.
Tri-Series in Australia 2015
Australia win by 112 runs
Australia and New Zealand will co-host the 2015 Cricket World Cup from February - here's a taster of what's in store.
England can take great heart from reaching Sunday's Tri-Series final with a tough win over India, says David Lloyd.
David Lloyd raises a glass to the 'Tubby' Taylor wine tour, the BBL and England's showdown with India.
England's World Cup opponents will not relish the return of fit-again James Anderson, says Nick Knight.
Bob Willis says AB de Villiers could well be the best batsman of all time after blasting a record ODI ton off 31 balls.
As England fly off to Australia, Nasser Hussain explains why 2015 is a year to savour...
Sky Sports' cricket experts have picked their favourite hundreds from previous World Cups. Do you agree with their choices?