Well I put a new b-50 string on my longbow, switched it from a FF string. Now the problem is I cannot find the sweet spot, The arrow is always kicking high. Is the switching of the string type changing my spine on my arrow at all?? Would this affect the arrow flight as in the kicking high? There is now left to right in the arrow just up and down. Very confusing to me today, a bit frustrating as well! Any help or suggestions would be greatly appreciated!

How high did you go, Joe (or low).

I'm just saying....I went a lot higher than I thought I might.  Looked weird, doing it.  Arrows fly awesome.

I would say I went 3/4 of an inch high, I moved it an 1/8 of an inch at a time, high then low. Very confusing. I will be spending the afternoon tomorrow trying to figure this out.

I know you know what you're doing.  I'm still new to all this.  When I went from 52# to 48# (same style longbow/ same bowyer), I had to raise my nocking point up a lot further than I thought I would.  It looked weird, but they fly true.

Good luck.

Move It on down slightly (nocking point).

LOL....I had to move mine UP!  :D  

Good luck, Joe.

You might have changed spline of your arrows are now too stiff it is possiable with a b50 string to loose a little power ,, Why not try a skinney string mabe a 10 or 12 strand dynaflight 97 and see increased speed and power and oh yea it may verywell be more Quiet (strings) are a cheap way to get a little more out of a Bow and also make it  shoot better most bows have too big a string on them

Steve, I went in both directions and nothing really changed, still poor arrow flight?? Confusing to say the least...

If my arrow spine changes is this going to affect the nocking point causing the bad arrow flight???

You would think that If the arrow spine did change It would be side to side and not up and down with the arrow flight.

Joe:

If you're bare shafting it....and ALL it's doing is porposing....

How can it be anything other than nocking point?  

Just wondering.

QuoteOriginally posted by GMMAT:
Joe:

If you're bare shafting it....and ALL it's doing is porposing....

How can it be anything other than nocking point?  

Just wondering.

Jeff me too, I'm scratching my head on this one! I've got the day off tomorrow and I'll be spending some time at the range trying to figure tis out.

Is the arrow nock slipping on the string? Smaller diameter serving maybe, try a nock below also?

Remember, B50 stretches-I leave my bow strung for 6 or 8 hours with a new B50 before shooting, to let it settle in.  You might need to keep readjusting your nock point while the string settles-only move your nock about the width of the nock at a time, maybe 1/16".  Your nock point shouldn't change that much between string types.  Your effective spine might change because FF doesn't stretch like B50.  What ever your nock point was with FF is a good starting point. If your nock is too low, the arrow will bounce off the shelf and porpoise.  Elknutz is also correct-if your nock is slipping, it'll give you fits trying to set the nock point.

Joe:  The dacron, because it has a little more stretch than the fast flite, will make the arrow act a little stiffer, but not enough to affect arrow flight, IMO.  A dacron string of the same number of strands is thicker than a FF string.  Might your arrow nocks now be a little tight on the string?  I agree with others.  Nock point height is the most obvious culpit.  Might put your other string on the bow if you still have it to measure where the nock point is on that one and then duplicate it with the dacron string.  I suspect you've already done that though.  One other thing it could be.  You!  Every now and then, for reasons that I can't explain, I'll get porposing out of my arrows without anything changing regarding the bow tune.  It's just the way I happen to grip or release the string that day, or some other mysterious thing.  Don't know what causes it, but it happens to me sometime.  Might try really focusing on your release and see what happens.  Good luck.

Thanks Jerry, thats what I'm going to do, take the old string with me and put a tape on it and set the nocking point on the new string from that and go from there, and focus more on my release as well!

Text book bareshaft would show a up or down kick as a nock adjustment, but a stiff arrow can also show as nock high.  
 You are definately lossing performance going to a B-50 string over the FF.  Your arrows are now too stiff.  You can verify this by increasing your point weight to weaken the shaft or shoot the same arrow, but in a longer length.

You just knocked five pounds off of your bow.  Odds are you are going to have to retune from scratch, unless you are one of those lucky people who can shoot just about any arrow out of your bow ( I have a shooting buddy like that, drives me up the wall!).

Well, I went out and started from scratch. I replaced the velcro plate and rest with leather. When I looked at the rest I knew this was adding to the problem, it was worn big time on the outside from the poor arrow flight yesterday. After a few shots with the new leather rest I knew right away the velcro being worn was a problem. I then started to move the nocking point in very small increments, she dialed right in. I must have been going right past the sweet spot when I was moving it yesterday.  I once again realized that tuning and frustration doesn't go together, hence the reason I walked away from it yesterday. My arrows are flying like darts, bare shaft and fletched hitting together! I appreciate all the help fellas, thanks again!