Surprise! (the bad kind)

[Twanger]

Shot some broadheads last night.
They were right there with my field points at 20 yds, but hitting a good 5" lower than field points at 30 yards.
What the?
Now I've got some head scratching to do.

[ncboman]

back your top limb off one complete turn and let us know the result.

You may have to resight slightly for perfection but the > or < difference at 30yds is what we're interested in more than impact point so I'd leave the sights alone for now.

ps, I usually try to work this out at 40 and work back from there. If you can get them both to hit the same horizontal plane at 40, I almost guarantee the same at all ranges.

I have had extreme difficulty doing this with same weight heads!!!

but have had great results putting 100gr broadhead together with 125gr fieldpoints, in fact, you may want to try 125gr fpts before backing the limb out.

I cannot explain why it works but it does.

[Buckfever]

If windage is good, I'd just adjust the nock point. 5" at 30 won't take much. Not that it will be real noticable but I'd bet that somewhere around 12-15 the broadheads are above the field points. They're getting even at 20 and then it really shows up at 30.

[Twanger]

Thanks guys. Windage appears to be good. Nock point is much harder to adjust than rest height.

Bowman - I'll try the limb adjustment first. I also like the idea of shooting heavier field points. What I REALLY want to be able to do is shoot out to 40 yds and have my BH's and FP's fall withing 1-2" of each other so I can practice with either during the season. I don't like being forced to shooting with BH's ONLY during the season.

I was also thinking about getting a spare sight block and having one sighted in for BH's, and one for FP's.

Man, not many days to sort this out before the season!

[ncboman]

Honestly I think resighting the bow with 125gr fpts will be the ultimate solution. Chances are the 20yd pin won't need to be moved but beyond that the pins will need adjustment. I'll almost bet that adjustment brings the bhs to the line.

I've done the interchangable sights before also but that's too much trouble in actual practice.

I extremely dislike moving the nock point because inevitably the serving gets damaged. Adjusting the rest is safer but as close as you are, the other items should be explored first, esp the 125gr points.

Playing with the limbbolts is something that I do by sound and feel when I have time to play around. On some bows a sweet spot can be noticed where you feel everything going into the arrow and the bow thumps very quietly at this spot. Some bows are more noticeable in this area than others.

Let us know how it goes. You're close enough that I don't think you risk screwing up your setup with minor adjustments.

[freedomrules3]

Did you change anything from last year in your setup? different bh's for instance? just wondering why it would go south all of a sudden.

[Twanger]

Rick - That's the puzzlement.
Last year I THOUGHT I compared FP's to BH's out to 40 yds.
Anyhoo, now they are different.
'Course, the bow has not been tuned recently, so maybe it has slipped out of tune.
Maybe a trip to Macrotech to visit Len is in order.

[Buckfever]

"Nock point is much harder to adjust than rest height."
"I extremely dislike moving the nock point because inevitably the serving gets damaged. Adjusting the rest is safer. "


That's what I meant. The only time I actually move the nock point is if there is a clearance issue of some sort and I need to get the rest and the nock point raised.

[Twanger]

I talked to Len last night on the phone, and he said it sure seems like something on the bow has changed... perhaps a thread broke in the string, or the serving slipped. I looked at the bow, and sure enough, there's a gap in the serving near the string-loop. Thinking back I remember exactly when it happened - about a month ago after tightening the limbs I shot a few arrows and everything was normal and then suddenly the poi shifted down about 5 inches at 30 yds. I also noticed that the cams don't appear to be in the same relative position, so perhaps I have cams out of synch too.

Looks like I'm gonna be driving to Baltimore.