Fixed crawl tuning

[the rifleman]

I have one lingbow that is tillered for 3 under and i have my crawl set at 1 1/8" below nock and it tunes great.

I was trying to tune my hunting bow w crawl and getting very poor bareshaft flight-- mostly weak at 15 and 20 yds.  I stepped back to 30 and held just under the nock and had great broadhead and bareshaft flight.  Back to 15 and 20 and 3/4" crawl and poor flight-- left and rights.  I moved my nocking point up to 27/32" during the tuning, but still had poor flight w crawl.  This bow is tillered for split.  Should i keep raising nocking point?  Do some bows just not tolerate a crawl?  Anyone else encounter similar tuning issues with crawl?  I did play w brace height and i do use 2 nocking points.

[katman]

Unless your really bouncing off the shelf raising nock point won't fix left and right, that is a spine issue. When I have a large crawl the shaft stiffens compared to shooting right below nock. Try adding 50 then 100 grains to point and see if it helps.

[the rifleman]

Ive tried different points w no significant change.  The nock height seems to have more impact.  Arrows fly well w no crawl and are well tuned.  Crawl gives me both left and right issues ( more lefts --weak for me a lefty).  I don't believe there is a spine issue, but more related to tiller...

[the rifleman]

I had some success this morning.  I made the following changes one at a time in the following order.
Raised my nock height to 29/32" and things got a little better.
Raised my crawl up from 1" to 1/2" and this really helped.
Still a bit weak, so i cut 1/4" off and a bit better.
I then raised brace height from 7 1/8" to 7 7/16" and better still.
Bareshafts seem more sensitive on this bow to my glitches and they are definitely nock high.
I put broadheads on--- a 125 magnus stinger and a 156 gr grizzly and got good flight.  Field point grouped with them for whatever thats worth.
I believe all adjustments were compromises to get the bow to do what i wanted it to do.  Ready to hunt now.