Strange shooting session

[mchurch]

I was shooting my excal equinox today and got some confusing results. I was shooting stock firebolts and 150 grain tips. I was also shooting Danny Miller arrows with 100 grain tips. The Danny Miller arrows weigh 405 grains and the firebolts and tip weigh 417 grains. I used the crankaroo on both and the lighter Miller arrows were consistently 3-4 inches lower at 30 yards. What gives?

[Normous]

Two different arrows with two different weight tips and FOC will result in two different POI's.

[mchurch]

I would have thought that the lighter arrow would have hit higher?

[masboy]

my equinox does the same thing 3inches high at30yds shooting firebolts with150 tips.my gt11 have brass inserts in front with 100gr tips .if gtii are what you have .more weight in front of arrow.thats just my guess.

[strum]

I was shooting my excal equinox today and got some confusing results. I was shooting stock firebolts and 150 grain tips. I was also shooting Danny Miller arrows with 100 grain tips. The Danny Miller arrows weigh 405 grains and the firebolts and tip weigh 417 grains. I used the crankaroo on both and the lighter Miller arrows were consistently 3-4 inches lower at 30 yards. What gives?

im no expert at all so someone more knowledgeable than me may have better answer.. but im thinking the heaver arrows are holding thier
energy longer resulting in a straighter line at 30 ..even if the lighter arrow is faster out of the bow it may lose speed faster on out there.

[mchurch]

They are the gold tips 2's with brass inserts. I think the momentum thing may be right. I was pretty surprised.

[ComfyBear]

They are the gold tips 2's with brass inserts. I think the momentum thing may be right. I was pretty surprised.

If you were to check the FOC on both arrows, chances are that the FOC on the gold tips' is greater. That would make them initially fly fairly flat at closer ranges and then experience a more pronounced drop as the range increases.

[Big John]

Comfy is correct. The Gold tips have a 110 gr. brass front plus a 100 gr. head.
The firebolts have an aluminum front insert and a 150 gr. head.
So the Gold tips are about 50 gr. heavier in front. approx.
FOC not even close.

[sumner4991]

They are taking a nose dive.

Trade-offs.

[Horizontal Hunter]

They are the gold tips 2's with brass inserts. I think the momentum thing may be right. I was pretty surprised.

If you were to check the FOC on both arrows, chances are that the FOC on the gold tips' is greater. That would make them initially fly fairly flat at closer ranges and then experience a more pronounced drop as the range increases.

Plus I bet that they are fletched differently.

Bob