Depends, if the BH are groups as good as the field points, I will play with it a bit to get it perfect, if not, I move the sight. The BH of the same weight is different than a field point of the same weight and it SOMETIMES won't fly the same even out of a perfectly tuned bow. The weight is spread out over a couple inches where a FP concentrates the weight right at the end of the shaft, this can mess with the FOC a bit depending on arrow weight and BH weight. So ya, I try and get em together for practice sake, but if I am shooitng tight BH groups I will move the sight.
I got my old PSE sighted in perfectly with XX75's #2315's and 125gr tips.
Field tips:
20 yards - darn near hit the previous arrow, rip fletchings, etc...
30 yards - 1/2" groups.
40 yards - 1" groups. Thunderheads:
20 yards - hit same exact spot as field tips just did.
30 yards - fly perfectly, but hit just a hair lower, I mean a hair. I mean, we're talking tiny fractions here. No need to adjust.
40 yards - honest... haven't tried the Thunderheads out to 40 yards yet, but assume they will fly perfect as well.
Tune your bow for the broadheads, then re-sight it in.
That's what I do.
After I did that, my field points have always grouped well, maybe not the same POI, but still grouped. I do very limited shooting with field points however.
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"I do not Hunt animals to Kill them. I kill animals because I Hunt." Roger Rothhaar
Some would argue that tuning your bow to shoot your broad heads along with your field tips is the wrong way to do it. It's really a matter of opinion. There really isn't a right or wrong way. Some prefere to tune thier bow to shoot really good groups with both broad heads and field tips, and if the sights don't line up, they move them, or use different sights to hunt with.
I personally try to get my fixed blades to hit as close to my target points as I can. But if I know my bow is shooting well, I won't go crazy with the adjustments to get it done. I'm not going to purposely throw my bow out of tune to make them impact together. Lets say you get them to impact together but your fixed heads group into a three inch circle when your field points would group into a 1 inch circle. That's not right in my opinion and you are going in the wrong direction. Sometimes you can just switch heads and get a different impact point!? Does that mean your bow is suddenly out of tune?
From what I have seen to get your fixed heads to group with your field points and still have both group really well, you need to have pretty well spined arrows. And like said above, your foc can play a part in at as well for up and down variances at longer ranges. So that means you have to play with your arrow length, tip weight and draw weight to get it perfect sometimes.
Down load eastons tuning guide, it can be a big help. It sure is nice to have them both impact the same spot, but sometimes it's just not going to happen without getting different arows. If you have to drastically change your rest to do it, I wouldn't. I would tune it to where they group the best and move the sights. Then when you can afford it try to get different arrows. It's much more important for your hunting arrows to fly straight then to impact with your field tips.
Paul
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I didn't climb to the top of the food chain to eat carrots! (Ron White)
I used to drive myself crazy trying to get the FPs and BHs together (moved the rest and all the other tricks you read about), but finally just bought a separate sight. (The Cobra sights come with a little clamp on the horizontal bar that makes switching from one sight to another a ten-second affair.)
On my last eight bows the BHs always flew a few inches left at 40 yds, and at the longer ranges the BHs dropped a little more.
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Never trust a bow under 40 (inches).
I do. As long as my arrows are flying straight and my set up is
grouping well I just re-sight in and hunt. I don't hunt with field points
so why shoot them? Accuracy with broadheads is what I want.
BHs and FTs won't hit the same spot? That's different.
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