Skipper Michael Klinger hit his second century in as many innings as Gloucestershire produced a strong batting display on the third day of the rain-affected match against Hampshire at Bristol.
The Australian opener was unbeaten on 131 when bad light ended play at 5.50pm, with his side on 284-2 in reply to 274. Dan Housego (56), Chris Dent (45) and Alex Gidman (38 not out) were the other contributors.
The start of the day had seen Hampshire's last man James Tomlinson dismissed, which meant their captain Jimmy Adams carried his bat for 138 not out off 269 balls, with 15 fours and a six.
Thanks largely to his efforts the visitors were able to post a competitive total, having been 97-8 at one stage. But soon Klinger and Dent were putting the pitch in perspective with a fluent opening partnership.
Klinger survived a low chance to Liam Dawson at second slip off David Balcombe when on five and it proved a costly error for Hampshire.
Dent was unbeaten on 37 when he surrendered his wicket to a loose drive having added eight more runs and edged James Tomlinson to wicketkeeper Adam Wheater, who had earlier needed lengthy treatment for a bruised thumb.
The opening stand had been worth 119 and Housego was soon looking equally at home on the flat pitch. He and Klinger both deposited Briggs over the ropes at long-on and were also severe on anything pitched short.
After five overs had been lost to rain following the tea interval, Housego was eventually bowled by a full delivery from Liam Dawson to leave Gloucestershire 228-2.
Gidman enjoyed himself with three straight sixes off Dawson as his side passed Hampshire's total in the evening gloom.