I would agree with the others, I practice in the same manner with 3", 6" and 9" targets up to 35 yards.
Had to qualify on Fort Belvoir bow only hunting at 20 yds, and 30 yds at a 9" plate for me my practice habits made that 9" seem huge..lol
4 of 6 arrows had to be placed within it. Always room for improvement IMO