Proper Nock Fit

Proper Nock Fit

The fit between the arrow nock and the bowstring can affect accuracy

Most archers believe a tight fit is best. The author believes that when using a string loop, a looser fit may be the way to go.

As you may have noticed from reading my columns, I am a stickler for details. Most serious archery hunters and competitors understand all the obvious issues affecting accuracy, but often you gain the most decisive advantage by sweating the small stuff--the stuff that everyone else overlooks. For example, I have long wondered how the fit between the arrow nock and bowstring really affects accuracy. I have always felt that a tight fit was the way to go, but after watching a number of slow motion videos showing arrows being released, I now have my doubts.

If you have never watched an arrow launched in slow motion, you really need to make a point of doing so. You can find sample footage on the web by doing a search under "slow motion arrow flight." It is shocking to see how the sudden release of energy rattles the bow and its accessories. I was particularly surprised by the amount of movement exhibited by the bowstring nocking loop. It flops to the side and twists the string dramatically at the moment when the arrow snaps free. This twisting action of the string must affect the flight of the arrow even if only slightly.


Q & A With A Professional
I wanted to ask a professional about nock fit so I contacted Mike Slinkard, a top competitive archer and the president of Winner's Choice Custom Bowstrings. This makes Mike one of the most qualified sources of information on all things related to bow strings. Here is an excerpt from our discussion.



Randy: How tight (or loose) do you think a nock should fit for maximum accuracy and forgiveness? The more slow motion video I see, the more I think that a loose fit is best because the amount of string twist caused by the nocking loop. It seems that if the nock were tight, the twisting motion at that critical time in an arrows flight might cause some inconsistencies down range.

Also, what serving material would you recommend that isn't malleable, so the serving will maintain a perfectly cylindrical shape inside the nock even after thousands of shots? I know monofilament nylon might be best, but it is impractical because it tends to break. What are your thoughts?


Mike Slinkard: I have played with nock fit quite a bit, and now I want my nocks to snap onto the serving. However, when they are on the string, the nock should be able to slide up and down with little or no pressure. As you state, the string is twisting inside the nock during the shot, and with a loop, this is even more pronounced because the weight of the loop itself will intensify this action. In my mind, if the nock fit is loose, then this twisting action will have much less effect on the arrow and deliver it more in a straight line out of the bow.


Of course, you really need the nock to snap onto the string to keep it in place, especially in a hunting situation, but that "snap" off the string really does not occur until the arrow is leaving the string, and then twisting could only affect it for a very short time before it is gone.

From a practical standpoint, I have seen better arrow groups from nocks that fit as I just described, especially with broadheads. All this is really one of the main reasons our strings come with the .021-inch diameter serving instead of a larger size. I believe, for most shooters, it will yield a more accurate shot and be easier to tune. Of course, this all depends on the nocks a person is using, but for the most part our 20 strand BCY 8125 strings with .021-inch serving will produce the correct nock fit for most regular sized nocks such as Super-Uni nocks and large groove G and X Nocks.

As far as serving material goes, probably the best stuff out there for holding its shape is the BCY Halo in .019-inch diameter. However, Halo is a little more susceptible to separation, which is a definite negative. Some of the top shooters we have on staff use this center serving with great results. This diameter will provide even a little looser nock fit than the .021-inch material but it is still within the acceptable range. Our standard center serving is our exclusive X-Braid Plus, which also holds shape very well and does not have any separation issue.

Conclusion
You may think that something as mundane as nock fit cannot possibly matter when all you want to do is shoot a whitetail at 20 yards. You may be right about that, but if you are trying to shoot a mule deer at 50 yards, an antelope at 40 yards or win a local archery competition, everything matters--right down to the smallest details. One of the small details that can make a real difference in your shooting is nock fit.

Recommended for You

Follow Bill Winke's tips to ensure you have the most accurate bowhunting setup possible. How-To

Goof-Proof Tips For Sighting-In Your Bow

Bill Winke

Follow Bill Winke's tips to ensure you have the most accurate bowhunting setup possible.

Mid-Summer Is Prime Time to Watch Large-Racked Bucks — and Stoke Fall Enthusiasm! How-To

Summer Scouting Spectacular

Bill Winke - July 17, 2019

Mid-Summer Is Prime Time to Watch Large-Racked Bucks — and Stoke Fall Enthusiasm!

Light up a buck's taste buds while drawing him in for a close shot. Whitetail

Hidey-Hole Whitetail Food Plots

Brad M. Mormann & Dr. Grant R. Woods

Light up a buck's taste buds while drawing him in for a close shot.

See More Recommendations

Popular Videos

First Look: Mathews Vertix Bow

First Look: Mathews Vertix Bow

"Petersen's Bowhunting" editor Christian Berg and Mathews design engineer Mark Hayes talk the smooth, quiet and fast shooting qualities of the new flagship Vertix bow from the Wisconsin bowmaker.

Crossbow Boar Hunting

Crossbow Boar Hunting

Craig Boddington is armed with his crossbow and puts the stalk on a wild boar.

Center Shots: How to Improve Your Bow Tuning

Center Shots: How to Improve Your Bow Tuning

Field editor Bill Winke goes over steps you can take to improve the tuning on your bow.

See more Popular Videos

Trending Stories

Mid-Summer Is Prime Time to Watch Large-Racked Bucks — and Stoke Fall Enthusiasm! How-To

Summer Scouting Spectacular

Bill Winke - July 17, 2019

Mid-Summer Is Prime Time to Watch Large-Racked Bucks — and Stoke Fall Enthusiasm!

Check out our picks for the best new bow sights from the 2019 ATA Show! ATA Show

Best New Bow Sights for 2019

Tony J. Peterson - January 10, 2019

Check out our picks for the best new bow sights from the 2019 ATA Show!

We got our hands on the brand new 2019 bows from Bowtech. See how the Realm SR6 and the Realm SS performed in our technical tests! Bows

2019 Bowtech Launch: Realm SR6 & SS Review

Jon E. Silks - November 07, 2018

We got our hands on the brand new 2019 bows from Bowtech. See how the Realm SR6 and the Realm...

See More Stories

More How-To

Try these tactics for sneaking out of the woods when you're surrounded by deer at dark! How-To

How To Leave Your Treestand Without Spooking Deer

Bill Winke

Try these tactics for sneaking out of the woods when you're surrounded by deer at dark!

A misaligned peep can lead to missed opportunities in the field. How-To

How to Fix & Prevent Peep Sight Rotation

Randy Ulmer

A misaligned peep can lead to missed opportunities in the field.

Follow Bill Winke's tips for avoiding some of the most common problems that could ruin your chance at the buck of a lifetime. How-To

Common Bowhunting Equipment and Execution Errors

Bill Winke - September 22, 2018

Follow Bill Winke's tips for avoiding some of the most common problems that could ruin your...

See More How-To

GET THE MAGAZINE Subscribe & Save

Temporary Price Reduction

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE

GET THE NEWSLETTER Join the List and Never Miss a Thing.

×