Increased arrow weight, increase drop??

[capt eddie]

I was out target practicing with my son and his wheeled bow. 70 lb cam, 550 grain arrow, release, sights the whole nine yards.278 FPS. I was shooting 69 LB Treestick wood and AD arrows 650 to 810 grains in weight.  At 20 yards he was touching arrows.  I was shooting 3 inch groups.  At 30 yards he had two inch groups while I had 6 inch groups. All my arrow weights grouped together reguardless of arrow weight.  Then we let him change his 100gr FP to some of my 250 gr FP.  At 20 yards arrows were still touching but 10 inches lower.  At 30 yards they were 20 inches low. I shot 160 gr differant arrows with no change of grouping. Why is there such a big differance in the two types of bows.

[George D. Stout]

There isn't!   He is using a sight and it is noticeable due to using the pins.  You aren't noticeing because you don't have a pin for reference....you are adapting to the weight and distance.  It's an illusion to think there is no difference.

[sweet old bill]

George hit the nail on the head.

The increase in weight sure would mean he would be required to again sight in to change the amound of distance between the pin...


you on the other hand have already done this  thru your hand and eye coordination.