The 18-year-old winger crossed for Albion’s first score in their 22-17 win at Hartpury.
“That was my first senior try and I was over the moon,” said Cully.
“Hopefully, the floodgates will open now for me.”
Although thrilled to score his first league try, Cully was more delighted with Albion’s victory.
He said: “Going to Hartpury, who were at the top of the league and who had not lost at home this season, was a massive win for the boys.
“The boys are on an absolute high at the moment. We have strung some good wins together now. Hopefully, we can carry that on in the new year.
“We’ve got a bit of time off now so everyone can recoup and hopefully keep the form we have got now.”
Cully’s try for Albion came after he had spent a week training with the England Under-20 squad.
“It was great for me getting some experience at that level,” said Cully, who was joined at the England Under-20 training camp by Jack Maunder.
“I was buzzing to be able to come straight back and get a try.”
Cully, dual registered with Albion from Exeter Chiefs, has not earned any international honours yet, but he is hoping to do in the near future.
“It’s a massive dream for me,” he said. “I have always wanted to play for England so getting in there (England Under-20s) is the next step up for me.”