Micro diameter arrows

[bowmaster12]

If one was thinking about switching fron standarad carbons to micro diameter, who much would change? Would the same spine be a good starting point or with the arrowing sitting closer to the strike plate would it change the dynamic spine enough to have to shoot a different spine all togeather? So much to pounder in this never ending journey

[Orion]

Yep.  Skinnier shaft may need to be spined heavier.  Or maybe not, depending on how close you're currently tuned.  Only way to find out is to try it.

[Noah70]

I moved from GT Warrior shafts, 30” long and 500 spine, 150g point to the identical length and spine in Victory VAP micro diameter shafts.  There was literally no difference in the tuning, although I had to reposition the nock point down by a small amount. The smaller diameter shaft sits lower I suppose. I also found that I could move down to 125g points with no significant change in aim point. But I shoot 150g broadheads, so am leaving the heavier field tips on anyway.  The change did not make any real difference in groups, and I don’t shoot in strong crosswinds over great distances, so was it worth the higher price? Not really, but they look cooler.

[fujimo]

In theory on the micros, the central axis of the shaft is closer to the centre line of the bow, depending of course,  entirely on how the bow shelf is cut and if you are shooting on an elevated rest.
But in a  shy of the centre  shelf, the bow/ arrow combo would in theory necessitate a slightly stiffer shaft.

But like said above shooting fletchless will be the only way to truly tell

[bucknut]

It is hard to answer not having bow info. I have found that it is largely bow dependent.  My past center cut bows are way less finicky and can shoot a wider range of spine and diameter shafts than center or before center cut bows.
Just my opinion.  John

[Hunter74]

I’ve shot micro diameter arrows for several years now and love them, that said there is a little more work into them then standard size shafts if you want the best (strongest) setup. I recommend the Black Eagle X-impact shafts. They are far stronger than the VAP’s and they are light so you can put a lot of weight up front. The Achilles heal of micro’s is the insert/outsert. The best I have found is the insert and sleeve setup from Ethics archery, very strong but a little work involved to tune, fit and install them straight. Second best I have found is the Victory shock taper lock insert. They are available in 3 versions, all aluminum, alum/stainless and all stainless, I’d recommend the latter two. They also come in several sizes based on outside diameter so if you mix match arrow brand you would need to cross reference size because they’re all slightly different. I believe the Black Eagles are slightly smaller outside diameter while the Blood Sport are slightly larger OD then the VAP’s.

For spine selection you will need to test and tune. For both my takedown recurves cut 1/8 past center I need to use one spine size stiffer with the micro’s. So for my light bow (56#@30”) I use a 350 spine shaft with 275 grains at the tip and is actually a touch on the weak side. My heavy bow (70#@30”) uses a 250 spine with 305 grains up front and dialed very well. I think it helps having a cleaner release with the heavier bow.

With both of these setups I used one spine size weaker in standard diameter carbons. I don’t know all the technical stuff as far as the bow paradox affecting the skinnier shaft but another possible factor is that all things being equal a skinnier tube won’t be as stiff as a fatter one. It can be the same strength but the fatter tube will be stiffer while the skinnier tube can flex more. Guess I don’t get too concerned with why I just test and tinker till I get where I want to go, after all that’s the fun in archery!