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.
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.
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...
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.