Hey everyone. I’m fairly new to archery hunting. I killed my first buck this year but I’ve been shooting archery for years. I’ve looked at plenty of charts and had one guy tell me my arrows are underspined for my length and draw weight. I’m shooting at between 70-72 pounds with a 30 in draw length and roughly a 30.5 inch arrow. I’m shooting easton bloodlines 330s. According to charts im underspined and my arrows “shouldn’t group that well” but my groups up to 40 yards are all very well and I’m without a doubt confident in shooting an animal at 40 yards. The buck I shot this year I shot at about 15 yards with a rage and hit him in the shoulder. Penetrated well but didn’t pass through. I’ve been thinking if my arrows were correctly spined if they would have passed through. According to charts I should be somewhere in the 260-240 What do you guys think (stiffness wise) I should be shooting??