Life doesn't get much better for Jono Dean as the ACT Comets captain comes to terms with an incredible week that started with a breakthrough half-century against the West Indies, and finished with the second-highest individual score in Canberra grade cricket history.

Dean hammered an unbeaten 300 for Queanbeyan on the first day of its two-day Douglas Cup match with Ginninderra on Saturday, belting 17 sixes and 21 fours.

The knock came four days after the 28-year-old burst to prominence with a sparkling 51 off 40 balls for the Prime Minister's XI at Manuka Oval on Tuesday.

Dean says he's open to offers for a stint in the Big Bash League and would consider moving interstate for the chance to play first-class cricket.

But his immediate focus on Sunday was enjoying a well-deserved rest and spending time with wife Kim and nine-month-old son Nixon at Chisholm Oval and watching Queanbeyan's second XI play Tuggeranong.

He joined club great Peter Solway as the only players to hit triple-centuries in the Canberra grade competition.

Dean was unaware of the record when Queanbeyan declared at 7-457 with seven overs left, but said it was right that Solway's mark of 339 from the 1989-90 season remained as the benchmark.

''He can have it as a sign of respect, I'm just happy to be part of that 300 club with him,'' Dean said.

''I had a little luck [getting dropped] second ball of the game, and from there I settled in for the day. It was a pretty good feeling.''

If Dean had had his way, he would have been back in the sheds after reaching 200.

But when the declaration didn't come, he got on with the task of putting the team first and chasing quick runs.

The powerful strokemaker began conservatively as he aimed to make the most of his start, after learning a valuable lesson from the Prime Minister's XI match, holing out at long-off when he had the chance of a century.

''I hadn't played in that environment before, and I guess I was running on adrenaline,'' Dean said.

''I was all go and wasn't able to pull myself back, whereas with club cricket and Futures League I'm used to doing that.

''Tuesday was about proving to myself and other people that I've got the skills and the range to dominate at that level. I just needed the opportunity.

''I've got a family down here, but me and my wife are open to the fact that other opportunities might come up,'' Dean said.

''We are willing to think about other options, but until that sort of thing did come up we won't think about it too much.

''I'm quite happy in Canberra, so we'll have to wait and see.''