The Wigan favourite, who has been Super League's leading tryscorer for each of the last two seasons, began the World Cup on England's right wing against Australia and scored their fourth try of that match only to make way for Tom Briscoe for the next two group games.
He was recalled against the French and made the most of his chance, scoring two more tries in a 34-6 victory at the DW Stadium to take his total for the year for club and country to a remarkable 46, but he is now facing an anxious wait to see if it is enough.
Charnley admits it was frustrating having to watch the games against Ireland and Fiji from the sidelines but says he has every confidence in England coach Steve McNamara to make the right calls.
"It has been difficult but it's one of those things," Charnley said. "I've tried but not just been picked.
"The squad has been impressive so it's been hard to get back in the squad. Hopefully, I have done enough to keep my place.
"If you don't get picked you have got to try and work hard and try to get the nod. I have tried my hardest for the past two weeks and I got the nod.
"It's my first World Cup and I am still learning. He (McNamara) knows what he is doing so I have got to bite my tongue and just try to work hard to get back in."
Left winger Ryan Hall matched Charnley's feat at the DW Stadium, scoring his seventh and eighth tries of the tournament before half-time to maintain his place at the top of chart, while back-row forwards Brett Ferres and Sean O'Loughlin scored England's second-half tries.
Charnley is one of six Wigan players in the England squad hoping to enjoy a second Wembley triumph in three months following their Challenge Cup victory over Hull at the national stadium in August.
But he knows it will take a big improvement on their display against France if England are to oust the holders in the first of the Wembley double-header.
"We've had two successes there so hopefully we get another one," Charnley said.
"But we need to step it up now. They are a strong squad and have got some talented players. They are the form team of the competition. They won it last time and they are strong this time.
"We know we can play well but we are making too many unforced errors and giving them too much ball which means more tackling and it's tiring us out. When we are attacking we are on the back foot.
"Everybody is a bit gutted because we haven't played to our potential."
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