Recurve bare shaft tuning

[Bladepeek]

There is just something drastically wrong with this picture. A 45@28 bow, pulling probably around 48# at your draw showing weak with a 5575 and 125gr point just doesn't match anything I've ever seen. I don't mean to suggest I've seen it all, but 2 or 3  spine groups above what seems to work in most cases just baffles me. No amount of cut from/past center is going to account for that much deviation. It just seems the bow is much heavier than it is marked, or something in the nock point or release that is causing that arrow to bounce all over the place.

There must be some other trad archers near you in Ohio that could take a look at what's going on and give you an impartial evaluation of the problem.

[Steiger3208]

Dynamic spine arrow calculator , on three rivers archery web page is calling for gold tip 75/95 black arrows with 100 grain brass inserts and 125 heads for a Martin hunter recurve 45# @ 28 bow drawn 29".  This makes sense now. 55/75 w/brass100 grain and 125 heads say it is way under spined.  I'm going to buy some this weekend and try them. I think the 100 grain brass insert is throwing everyone off. I will let you know my results. Thanks,  Wes

[Beau J]

I really think the 75/95 will be far too stiff. I would double your check nock height if it is too low it is very likely giving you a false weak reading.  BeauJ

[Longbowlogan]

I agree with Beau J, play with your nocking point because that can play a part in your left and rights. If you have a bad release then you won't get a accurate reading from the bareshaft either.

[Bladepeek]

Steiger3208, I ran all your numbers through Stu's calculator and they do seem to line up.

I've never built a really heavy, FOC arrow, but am going to give it a try.

It will slow my arrow down to about 155fps, but this would not be something I'd use for 3-D anyway. Might prove to be just the ticket for stuff up close, which is where I try to get my shots anyway.

I'm interested to see how your 7595s work out. I'm shooting quite a bit less bow, so I'm going try do the same thing with a 5575 for my light, 38# Blacktail. Right now I'm shooting a 30" 1535 with 11gr insert and 145gr point that is right on. I've shot my 3555s, set up for a 46# bow from the Blacktail and they fly well with a total of about 230gr up front. We'll see what happens when I put the anchor (and boat) up front.

[Bellasm]

You could try and put a tooth pick or thin piece of wood behind the strike plate. this will stiffen the shaft.