I've been posting threads about this problem for almost two years now and the problem gets worse as you look further into it. It's not just the deviation in the shafts, it's also the deviation in the field points themselves, that further complicates the problem.
So here are some tips that should help you solve these problems. First up is the quality of the arrows themselves. The PSE TAC15 arrows are a less than great quality of carbon and as such they are both out of round and inconsistent in shaft wall thickness. They only have a straightness factor of .003 end to end.
The latest Firenock Aerovane II, 200 arrow shafts are much more well suited in "Spine" and the carbon is a much new, more advanced woven fabric that utilizes the latest adhesive bonding technology to create a carbon arrow shaft that is completely uniform in roundness diameter, shaft wall thickness and has an end to end straightness factor of .001. These new arrows are much, much tougher than anything else available on the market and they are extremely closely matched in shaft to shaft weight.
Now let's talk for just a moment about the long range shooting capability of their latest arrows; these arrows are using much better fitting nocks and are equipped with "Aerovanes". "So What", you ask. Aerovane II's are the first vane ever produced to take advantage of the aerodynamic properties of "Lift" instead of the typical vanes that all work on the properties of "DRAG". Lift allows the arrow to maintain it's velocity much longer than a normal arrow that is slowed down by the properties of drag, therefore it will begin to drop much sooner. The Aerovane also imparts more "Spin" or "Rotation" on the arrow, so this makes it less susceptible to cross wind interferences than other arrows.
Last, Aerovane uses "Machined Field Points" that are closely matched in weight and they also fit their Field Points with Dual O-Rings to custom fit into their specially machined Inserts. This insures a perfectly balanced fit to maintain a concentric balance on the arrow shaft.
In short, you get what you pay for and there's absolutely no comparison between the PSE TAC15 Arrows and those produced by Firenock. Once you see or try using the new Aerobolt II's, you'll never be able to go back to using other arrows again.
So now let's talk about how to patch up the PSE TAC15 Arrows so they're somewhat usable. I add "Carbon Express CXL250 Bull Dog Nock Collars" to the back end of all my TAC15 Arrows. This does three things.
1. It maintains the roundness of the arrow shaft because the shaft can't
collapse the metal collar.
2. It adds a great deal of strength to the back of the arrow to stand up to rear
end collisions from other arrows.
3. It allows me to add extra small amounts of "Epoxy Cement" during the
installation process. I use this to add a few extra Grains of weight when
needed to match the weight of my heaviest shaft within a group.
Between the nock collars and gluing in the nocks themselves, if you are working with an electronic gram scale set to measure "Grains", you should easily be able to use a slow set Epoxy Cement to match the weight of each arrow down to the tenth of a grain. Always start with your heaviest shaft and after bonding the nock and collar using the smallest possible amount of glue record the finished weight of this shaft. Then bring all others to this weight by adding enough glue to achieve your desired finished weight.
It takes some time to complete them, but when finished they should be weight matched. PSE also does not provide closely matched Spines on their arrow shafts and they don't mark the stiff side of the spine on their arrows, so you will likely have some flight problems from shaft to shaft due to different oscillation frequencies or another words "Timing Problems" due to nocks not being properly "Indexed".
Firenock offers all this in their arrow shafts, so if anyone actually understood all the extras they were getting when purchasing the Firenock Aerobolt II arrows, they wouldn't hesitate to buy them. It's like trying to compare a Ferrari to a Volkswagon and wondering why the Volkswagon can't win a race against the other car.
When all we had was the PSE TAC15 arrows, we had to do the best we could and make due with them, but as in many things, times have changed and there are much better choices available today. For target shooting, I'd recommend the Aerobolt II - 250's, but for the hunter there's no better shaft than the newest Aerobolt II - 200's. These shafts hit like a ton of bricks and yet posses all the quality and straightness of the 250's.
I have a half dozen of the 200's, but the other half dozen is on the top of my Christmas List, just in case anybody is listening!!!!
P.S. - As I understand it, Andy and Len (Santa Claus) Backus are now stocking these outstanding arrow shafts in their LRH Store, so we don't have very far to go to find them.
My last comment for the night; I don't want people to think that these arrows I'm referring to are the best that money can buy for the TAC15 Crossbows because that would be a severe understatement. These are the best arrows that can be bought for "ANY" crossbow regardless of manufacturer. Jim, the owner of "Scorpyd" tested and used these same arrows for his latest "Ventilator 165 Series Crossbows, the latest line of "Mathews" crossbows and most of the newest 375 fps crossbows and up are all finding out why these new arrows are the best in the industry. But hey, don't just take my word for it, find out yourself why they're so special.