ORIGINAL: huntingson
I have one pin out to 30 yards. Couple inches high at 10, couple low at 30. My bow is shooting only 274fps. Remember that the arrow has an initial velocity in the positive z-direction and gravity must first bring that initial velocity to zero, and then it would begin to actually drop. I bet your calculations are not taking that into account.
Actually they are, if you are a couple high at 10 and a couple low at 30, your pin must be set around 25, which would be feasible, but your probably 3.5" high at 16-17yds if you hold dead on. Some of that can be accounted for in aiming, but no more than 2" of variation out to 32yds is impossible with any bow, unless the shooting is done in a vacuum that has no gravity.
ORIGINAL: BOWHUNTERCOP
I shoot a Mathews Switchback XT, Carbon Express Maxima 250 arrows, 100gr. head, I use one pin without any adjustments, and I'm good out to 40 yards
Joe,
How fast is your rig??? Even at 300, you have a trajectory arc around 17" high, 315 is 15.5". Shooting a 250 you must be shooting a lower poundage bow, or severely underspined. That's a 315 IBO rated bow correct??? And the arrow has to be around 335 or more grains??? Also looks like about 14" of drop between 30 and 40yds at 315, how do you compensate for that much drop with only one pin??? Seems to me, it's make more sense to have 2-3 pins, I have 3 out to 40, and still hold over or under a bit, and my set-up is 273-275fps.