I would agree that most bows can be tuned pretty well with the Biscuit, but having a few single cam bows with apparently bad nock travel that have been a bear to tune leads me to question if all bows follow this "rule." Perhaps adjusting the tiller could have helped, but I'm doubtful on that one. I know guys who are setting their nock point over 1/2" above square to get good flight with some singles and drop away rests. The one I recently had would "slam" the back of the arrow down, hitting the bracket, and putting black marks on my Bohning Blazer vanes. Broadheads shot low with this setup. I experimented with a drop away, and the broadheads now shot high, and a little right (with the same field pt. POI as with the Biscuit. When I put on a shoot through rest, it settled things down, but made a ringing vibration in the rest. I solved that problem by selling the bow, and replacing it with a Darton CPS system bow. No problems tuning now at all.

So how much does say a half-turn on the upper limb bolt change the tiller? I am sure that this depends on the brand and model of the bow and how many threads the bolt has, but I am looking for an estimate on how much to turn the bolt and actually get some results. So how sensitive is this bolt to the adjustment of the tiller? And on a side note, it seems like both the limb bolts would already be tightened fully, but I guess I never checked.

Thanks for your help

JOE PA,

I've seen an awful lot of bows with wildly out of tiller and ridiculously high nocking points over the years.

Of course a high nocking point would require a lot of extra tiller to accomodate it.

The interesting thing is that whether the arrow runs downhill or uphill to get to the rest the tiller of the bow can be adjusted to suit the situation.

If the arrow runs downhill to the rest the lower limb needs a little extra tiller for the bow to shoot straight.

If the arrow runs uphill to the rest the upper limb needs extra tiller for the bow to shoot straight.

In the case of the whisker biscuit sending the arrow through the rest at some absurd angle up, down, or sideways is going to put a larger cross-section of the fletching against the bristles, this will cause speed loss and complicate the tuning process.

I like to uncomplicate things as much as possible.

When I change strings and cables I adjust the bow to whatever the original specifications are at maximum poundage. If the limbs were evenly matched at the factory I think the tiller of the bow can be set pretty even by just turning the limb bolts out an equal number of turns each.

Raising the nocking point above square only serves to increase the nock pinch on your fingers or your release. The more acute the angle the worse the situation gets. So I nock at 90degrees to the bowstring.

I like to do all my tuning with a wrench.

You can set the arrow close enougfh to 90degrees to the bowstring by eye and you don't need a bowsquare.

The windage for the rest should be determined by grouptuning for the narrowest group at different distances. Setting your windage with a lazer doesn't always work.

Good luck tuning your bow!

Good luck hunting!
Remember to vote!

I figured out how to fix my vane wear/contact problem and like I suspected it was mostly due to the vane setup. I adjusted the tiller out of curiosity, but it didn't substantially seem to actually affect the nock travel. The change of vanes on the other hand made all the difference in the world. The company's name that makes the vane is Arizona Archery Enterprises Inc. They have developed it specifically for the whisker biscuit. It is a little bit lower profile then say a duravane, but it's made of a lighter and more resilient material. I am shooting an agressive right helical (maybe 5 degrees??) on a 4'' vane. There doesn't seem to be any difference in arrow flight (with field points or broadheads), even at 60 yards. And I have shot the same arrow 50 times or so without any wear/contact problems. The main reason they work so well with the Wisker Biscuit is because of their low profile.

Hear is a link to the AAP vane: http://www.cabelas.com/cabelas/en/te...ainCatcat21424

I had a whisker biscuit installed at a local arrow shop. He set it up with a laser...have several different types of arrows and vanes........have shot quite a lot in the last couple of days and have noticed no problems........my groupings are very tight at 20 and 30 yards which they werent before so I think it is because it was laser set....loving it too