The wife and I were just out shooting and she only brought out 3 arrows

She's shooting 3555 Gold Tips and I was shooting 2314 X7's

I was taking a break and when she got done shooting her 3 arrows, I handed her one of my 29 inch 2314's. She is shooting 55 pounds and a 26 inch draw and the first 2314 she shot went right into the X at 20 yards. I kept handing her my arrows and she continued to pound the X and had a very tight group!!! As I watched, the arrow flight was perfect and they really didn't seen much slower. I told her that we should get her some heavier aluminum arrows sometime and see if her groups get smaller. I'd suggest getting the ones with the unibushings also.