Stay away from spitfires and use rockets! I have been using the Rockets since they first came out. I use the 3 blade Miniblasters and now the Slammerheads. I have shot probably 15 deer or more with them. I get complete pass through unless I hit off side shoulder after it has gone through the vitals. Almost all the deer do not make it more than 50 yards, I had one go 80 yards, most go about 20 yards. It is kind of amazing the way the fall so quickly. I only shoot Broadside or Quartering away shots! I do not want to risk injuring a animal and not finding it. With the Rockets I am batting 100%. I have been bowhunting for 30 years. I went through the troubles of tuning fixed wing broadheads for years, some flew good, some did not, even though they spun perfect. With the Rockets I just match the weight of the fieldpoint and the broadhead that I use, 95 grains with the Slammerheads. I never had a problem with arrow flight with the Rockets. They are great on turkeys too! I shot a 220 lb field dress deer at 45 yards this year and I got cmplete pass through, he went 30 yards and dropped. I shoot a 60lb Bowtech Pro 40 DC and Carbon Express 300 arrows that weight 365 grains. I do believe carbons help give better penetration with the mechanical style broadheads. I will never go back to fixed!!!!