I just completed a simple test with two types of arrows.

Type "A" carbon arrows were 396 grains total weight with a .295 outside diameter .400 spine at approx 290 fps.

Type "B" carbon arrows were 443 grains total weight with a .302 outside diameter .300 spine at approx 280 fps.

Both type of arrows were shot from the same bow, set at thesame drawweight (63 pounds),at the same 10 yard mark into a foam target.

After shooting numerous arrows... type "A" arrows averaged 1.25 inches deeper penetration into foam target.

I have been hearing all this talk about heavier arrows having more "momentum"withbetter penetration, so I went out and purchased a $100 dozen. From this test I did, I'm seeing the opposite.

Only two things I can think of is the slightly larger outside diameter may be causingenough resistance through the foam, to out weigh the benefits of the momentumfrom the heavier arrows, or thebenefits of the heavier arrowsare only seen at longer ranges.If this is true, it sounds like to me that hunters that make their shots at closer ranges would be better off with the lighter arrows. Maybe I should try the same test at 50 yards. What are your thoughts?[:@]