This document summarizes the results of tests comparing the flight and accuracy of arrows fitted with regular pin nocks versus a new TwisterNock design. The tests found that at 40 yards, the groups with the TwisterNock hit 3.5 inches higher and had a smaller grouping than the regular nock. Additional testing with broadheads found the TwisterNock group was smaller and penetrated the target 4 inches deeper. The conclusion is that the TwisterNock improves arrow flight and accuracy over traditional nocks.

2. Archery Focus 15
improvement in spine recovery due to the increased
recovery time the TwisterNock provides.
Equipment Used For This Test
Spot Hogg Hooter Shooter
Bow ( 2008 BowTech Tribute) with hunting set up
• 55# draw weight.
• Multi pin sight(Vital Gear)
• Drop away rest (Trophy Taker)
• 6˝ stabilizer
Arrows used – Gold Tip X Cutter Pro
• Arrow weight of 383 grain complete with fletch-
ing, Pin Nock and Pin Bushing
• Arrow Weight of 382 grain with TwisterNock
• 2˝ Blazer vanes
• TwisterNock (Model A1)
Nikon Archer’s Choice rangefinder (for setting target
distances)
Chronograph (F-1 Shooting Chrony)
Testing Process Used
The test was done to check the flight pattern and
grouping of the arrows with the different nock assem-
blies installed. No fine tuning was done to the bow to
increase accuracy.
This test was performed using three(3) arrows
labeled A, B, and C. The arrows were fletched at a 1°
offset using the Bohning Tower Fletching Jig. All tests
were performed with the different nock assemblies at 20
and 40 yards. The results were logged and the arrows
were then re-fletched at 3° and the tests repeated.
Arrow Speed Testing
For this test the chronograph was set at 1 arrow
length from the riser, and in front of the bow. All
arrows where shot from the same exact position. All
speeds listed are in feet per second (fps).
Test Arrow A B C
1° fletch/ Regular Nock 262.1 262.0 261.6
1° fletch/ TwisterNock 262.7 263.0 262.5
3° fletch/ Regular Nock 258.5 261.4 262.0
3° fletch/ TwisterNock 259.5 261.6 264.2
Grouping at 20 yards (with 1° fletching)
Groups of three arrows were shot with both Regular
Nock and TwisterNock (see photo next page).
At 20 yards, the groupings were the same for both
nock assemblies. The TwisterNock did hit slightly
higher, but it was too small to measure properly. (A
higher hit point indicates the arrow received more
energy from the bow.)

3. Archery Focus
Grouping at 40 yards (with 1° fletching)
The three arrow group with the Regular Nock hit 1˝
below the center with a group size (largest extent) of
11⁄2˝.
The three arrow group with the TwisterNock hit
21⁄2˝ above center with a group size of 3⁄4˝.
Note The difference in the arrow trajectory at 40
yards showed a 31⁄2˝ difference in the height of the
group centers when comparing the Regular Nock to
the TwisterNock.
Grouping at 20 yards (with 3° fletching)
The three arrow group with Regular Nock hit 1⁄2˝
bellow the center with the group averaging 11⁄4˝ in
size.
The three arrow group with TwisterNock hit
1˝ above the center. The group size was 1 3⁄4˝ in
a vertical direction only.
Note The difference in group center height was
11⁄2˝. TwisterNock arrows impacted higher.
Grouping at 40 yards (with 3° fletching)
The three arrow group with the Regular Nock hit 1
3⁄4˝ below the center mark with a 2˝ grouping.
The three arrow group with the TwisterNock hit
7⁄8˝ above the center resulting in a 1⁄8˝ grouping.
Note The difference in arrow trajectory at 40 yard
between Regular Nock and TwisterNock is 25⁄8˝.
Arrows fitted with the TwisterNock impacted higher
again.
Grouping and Penetration at 20 yards
(with broadheads)
We decided the results were so good we would go
ahead and check performance with a broad head fit-
ted. We took a single arrow: 350 grain cut to 30˝ with
a straightness of ±6 thousandths of an inch. We used
a Twister vane sleeve for a G5 Montec broadhead
(100 gr, three blade) and shot at a block target. We
shot the same arrow, fitted with a regular nock,
three(3) times into block target.Then we changed the
nock for TwisterNock and shot that arrow three(3)
times. We measured the penetration of all shots.
The Results The Regular Nock group was 25⁄8˝
while the TwisterNock group was 11⁄8˝. The average
penetration of the TwisterNock shots was 4˝ greater
than the Regular Nock arrows.
Conclusion
While we don’t have a fancy testing lab we managed
to create some tests that were more similar to what
hunters experience out if the field that showed that
we were on the right path in the development of our
new TwisterNock.
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For more information about TwisterNock
visit: www.HuntingRevolution.com