Ball Compression from Low to High (vs. hardness)
Robert Cotter (About
Golf Ball Engineer
of Golf Swing Instruction, Instant Golf®
receive a lot of questions about golf balls this time of year
from golfers who are stocking up in preparation
for a great 2019 season, or looking for the perfect gift for
family/friends (or themselves)! The ball questions usually entail
specifics about this or that product, ball comparisons, distance,
such golfer recently wrote in looking for information on golf
ball compressions as he likes a "softer" golf
ball, but still wanted excellent distance.
this report I thought I would explain the difference between
Golf Ball Compression vs. Hardness as they are
2 important ball characteristics, and they are often confused.
you have been playing this game for any period of time, you may
remember the days when many golf balls came in both 90
and 100 compressions for a given model.
the 90 low compression golf balls were stamped
with red numbers and the 100's with black. To the right is a
with a red number 3.
100 compression model would have had a black number. There is
also a "side stamp" on both balls designating either
90 or 100 (compression).
ball compression can be defined as the relative resistance of
the ball to being deformed. It is also related to the firmness
of the ball's core and COR (coefficient of restitution). This
comparative value is determined with a finely tuned compression
testing gauge similar
is important to note that the United States Golf Association
(USGA) does not have a standard for golf ball compression.
Hence, there is no minimum or maximum value a ball must exhibit
to be considered legal. So it is important to note that:
Ball Compression is a Relative Measurement!
one manufacturer may have a 95 compression
golf ball (by their measurements) that is actually firmer than
another company's 85 compression golf ball!
is one of the reasons manufacturers seldom advertise or list
their golf ball compressions these days. It also can give the
consumer another data point with which they can rule out a buying
one product or another. Typically they will use expressions like
"low compression construction" vs. a number value.
what about Golf Ball Hardness? Hardness is actually
a property of the cover of the golf ball. There are specific
standards for hardness and different measurement scales. Golf
balls are measured using the "Shore D" scale.
gauges like the one on the right have a small metal point that
is used to puncture just the cover of the golf ball (through
the paint). A resultant cover hardness value may something like
"60 Shore D" (not to be confused with 60 compression!).
gauges are highly calibrated and often linked to computers for
data transfer. These are very precise instruments and require
a lot of data points (measurements) for a meaningful hardness
have spent many hours measuring the compression and hardness
of golf balls in the ball industry...
it is eye opening.
the Compression vs. Hardness Story gets Real Interesting...
of the low compression balls out there actually have very
hard covers! So they may feel soft off the
driver or irons, but like "rocks" off the putter.
driver and long irons/hybrids engage more of the core when a
golfer strikes the ball, so the player is experiencing and sensing
the properties of the core.
with chipping and especially putting, the golfer
feels the hardness of the cover (hence, less of the core) as
the strike is a low velocity impact.
of those great low compression golf balls (2
piece - a cover and core) designed for the lower or moderate
swing speeds actually have harder covers
as a low compression/soft cover golf ball would typically be
a formula for short drives and excessive spin (i.e. ballooning).
would want that situation on the course.
the other hand, the "Tour" balls the Pro's use (3 to 5 piece
constructions) have very soft covers (urethane rubber vs. plastic)
for that "drop and stop" action on the greens the top players
However, these Tour balls can also be quite firm (high
instance the 2018 Titleist Pro V1x, a 4 Piece Tour ball has a
compression of around 95-100 (rather high by today's standards),
but a very
soft cover for high spin on the approach shots.
Tour pros have very high swing and ball speeds so a firm construction
COR core is
one way to help optimize distance.
The ball's other layers also help reduce side spin (hook, slice,
ball like the
Wilson Duo and its 29 compression construction (yes, not a misprint)
with a soft plastic (not urethane rubber) has a different target
audience and is optimized for golfers with
speeds, launch angles, side spin issues.
a jungle out there with all those different constructions, cover
materials, mantle layers, mind boggling dimple
patterns, etc... and the well-intended golfer can easily get confused.
help with your Golf Ball Selection...
a US Patent Award winning golf ball engineer, I've worked knee
deep in golf ball technology for years, developing
new ball designs, and then matching the finished product to the
correct recreational and professional golfers based on their personal
needs and equipment parameters.
This experience led to an expert knowledge of ball components,
how they affect overall ball performance, and most importantly,
how to match the best golf ball to every type of players' game
for more distance and accuracy.
why I added expert Golf Ball Recommendations to
my new, 6 part golf instruction bundle. Golfers around the world
have found this unique bonus a most beneficial addition to The
Key To A Repeating Golf Swing instructional package.
the correct golf ball for you with a reliable, Repeating Golf
Swing is a winning formula for lower scores and more enjoyment
from this great game.
you are not happy with your game and are looking for
a new direction going forward in 2019, I would like the opportunity
to help you with your game by showing you The
Key To A Repeating Golf Swing and my complete swing
will benefit from my firsthand experience inside the ropes,
working with some of the top players in the game.
am convinced you will benefit tremendously from my swing
short game strategy, and professional golf ball
recommendations (learn more below).
all my years of playing golf, I have concluded that a
golfer can not break 80 without a repeating golf swing.
It does not have to be perfect, but it must be reproducible.
a repeating swing takes form, a whole new level of satisfaction
results as the golfer is now able to play the game the way it
trademark move, The Key to a Repeating Golf Swing delivers
the club head right back through the ball with precision power
and control. It is the star of the show. I can't play
fact my discovery of The Key was the
very catalyst for my whole career in the golf industry. It was
also the sole factor that..
my scores from the 110's to the 70's after struggling for years
with inconsistent ball striking and a stagnant handicap.
show you exactly what I've shown over 10,000 golfers from 61
countries, many of whom broke 80 in their very next round after
putting The Key into use.
have also added some great bonuses to my 2019 complete package including
new expert, yet brand unbiased new Golf Ball Reviews and
Recommendations for a variety of golfer types.
recently introduced the new 7th edition of "The
Key To A Repeating Golf Swing" to the golf
world and the response has been incredible. I
invested many hours and dollars getting everything up to my
standards and I couldn't be more pleased with the final results:
what you'll discover between the covers of the New 7th Edition:
Story - From the 100's to the 70's after a lengthy,
bitter struggle with this great game.
comment from a Ryder Cup star (watching my swing)
that reinforced my Swing Method.
to put your Golf Swing on Autopilot for every club
in your bag.
Why "traditional" instruction
fails the determined golfer and my unique solution.
denominator of all great men and women golfers
- It's not what you think!
discovery on a PGA tournament practice range that
changed my game forever.
you really need to know about alignment and grip
pressure (this is critical).
how to make your back swing consistent and Tour Caliber with
role of Your Feet in the golf swing and
how to use them correctly on every swing.
sequence images showing The Key To A Repeating
Swing in action!
role of the body and the arms in the golf
swing. Everyone get's this wrong.
how to make your back swing consistent and Tour caliber with
3 critical elements to the top of the back swing
(stage 2 of your 2 second swing).
about the "Power L" and
how it will transform your ball striking.
how to start your down swing for Perfect Balance
and Brilliant Impact.
unique drills to perfect The Key (you can do some
of them without a club in your home).
The Key To A Repeating Golf Swing frees up your
mind so you can enjoy your game.
much, much more Score Lowering insight and proven
On Course Strategy.
me show you exactly how to deliver the club head right back
through the ball at impact with tremendous power and control.
Thousands of golfers, from beginners to scratch
players, have put The Key to work in
their games and the results have been astounding (over 250
testimonials on file).
fact, the following is a note typical of the type that hit
my inbox all week. It is genuine and unsolicited:
ever even par round"
just wanted to pass on that over the last few weeks
I have being playing better and better, until the peak
which was just yesterday.
played at a local course and for the first time in
my life I shot under 80, and not just
under. I hit 38, 36. A day of firsts, first
ever even par round, first time in the 70's, 4 birdies,
just an all round amazing result.
owe a fair bit of it to you as I am adhering strictly
to your teaching.
Thanks again and best regards,
N. - Maylasia
P.S. I have just received 2 dozen (name removed) golf
balls, the ball you recommended for my game (although the score yesterday
was with a (name removed), needless to
say I'm starting to love this ball quite a lot) and the next time out
I intend to try this ball. I'll check in with you early in the new
year to see if there is anything else that you recommend."
instruction clears the head"
am sure you have received many testimonials in the
past but how many within the first few hours.
purchased & read your e-book this morning - as
usual, after reading I needed to go to the practice
range to see if it at least worked sometimes for me
before committing any further time - patience is not
one of my virtues.
I hit the ball well & hit what I was aiming at
most of the time that is not the reason for this reply.
the first time in my 40 years of golf I felt & knew
at the top when I was in a good position to hit the
ball solidly & could predict the outcome from
the top of my swing.
short, thank you - I now have the new sensation of
the correct feeling at the top - golf is not a game
of perfect but given 5 minutes practice I am convinced
that "simple" is the answer for the amateur/social
golfer to play good golf without hitting hundreds of
balls per day. - your instruction clears the head
of the thousand thoughts that ruin scores & a good
day out with the boys.
started a skeptic who expected the same rehash
of information, instead I am pleasantly surprised."
V. - Australia
day, dramatic improvement... Nice going Peter.
get notes like these all the time. It doesn't matter whether
you are trying to break 105 or 70, the rate of improvement
is typically rapid once the "bad data" is stripped
from a golfer, and The Key to a repeating golf swing
can begin working its magic.
(6) part instructional package comes in a Digital
Version (Instant Download) or Hardcopy Version (worldwide
what you'll receive for less than the price of a dozen,
premium golf balls:
New, Professionally Illustrated edition of "The
Key To A Repeating Golf Swing" Manual (standard
PDF format for PC and MAC computers, tablets, smart phones,
etc.. - Immediate, Simple Download) or Hardcopy Version!
Tour Event Special
OVER 50% Off, Very
in Progress Now)
$74 only $33.00
Order Now and you'll get the following
5 FREE Bonus
Gifts Worth AT LEAST $279.80!
Key To A Repeating Golf Swing" manual
is updated with new chapters, images, or
video, I receive an avalanche of emails from
current customers requesting a free update
to the Newest Edition. To date, they have
had to pay for the new edition (currently
the 7th edition).
a brief time, I am offering new customers FREE
Lifetime Updates to future new editions. When
you purchase either the digital or hardcopy
version of the package, you will be entitled
to lifetime free updates to "The
Key" manual (a full copy
in ebook form).
a US Patent award winning golf ball
engineer, I constantly receive requests
from all over the world for golf ball recommendations
and have been matching the correct ball to
individual golfers for years. Still active
in the industry, I have the "inside" scoop
on what new ball designs are ideal
for high and low handicap, senior, and women
are incredible New Golf Balls being
introduced during 2019 and Beyond.
fact, in my experience, about 85% of golfers I
work with are using the wrong ball for
their game for maximum distance and scoring. They
are also not using the correct driver loft
for their swing speed.
are the types of issues I address with my "Special
Reports". Here is a partial
list of equipment, industry, and coaching
updates you can receive. You will find them
invaluable, I guarantee it:
Golf Ball and Equipment Recommendations
for various golfer types (hcps).
Tips and Customer Video Swing Analysis
site reports from PGA Tournaments.
the top players are working on with
fitness for more distance and accuracy.
I take this commitment very seriously
and deliver these updates regularly throughout
Exclusive - "Putting
Rebel - Conversation with a Putting Wizard"
breakthrough work based on my in depth conversation
with the best putter I have
seen in all my years of playing golf.
the exact techniques this putting expert
uses that enables him to average less than 30
putts per round.
Rebel” Jay revealed to me how
he sees the big picture on the greens,
beyond the break and speed.
doesn’t matter whether the putts are
left to right, right to left, or bombs from
across the green. He buries the ball in the
hole like it is being pulled on a string.
is truly fascinating instruction that will
help your putting game instantly.
Exclusive - "Golf
what you really need to know about golf
ball construction from a golf ball design
- The real story
on Dimples, Spin Rate, and Performance!
to choose the right ball for your game
to lower your scores.
actual “on course” scenario
showing the effects of using the right
and wrong ball for your swing.
to evaluate a golf ball on the course and
Stephen Ladd's - "Renegade
Mindset Techniques for Golf"
why the final stage of success in golf
is in large part mental:
Stephen will show you how Anchoring turns
on your peak performance.
ingenuous Swish Pattern builds
complete confidence in your ability.
- The Brain
Scramble will enable
you to immediately forget blow
up holes and bad shots.
Stephen Ladd is re-owned as a
cutting edge mental game specialist. His
unique teaching style and techniques have
been used successfully by golfers in 72
countries. This revolutionary ebook is
a simple download.
guarantee your haven't seen or read anything
like this before!
Pedersen’s - "Fit
To A Tee"
Pedersen’s golf fitness
Ebook, “Fit To A Tee” (simple
how simple stretches can revolutionize your
game. Simple golf fitness for everyone.
is the featured golf fitness expert for
Golf Magazine’s website GolfOnline.com
and PGA.com. He has worked exclusively with
golfers for over 10 years.
And I back
it all up with a my no nonsense guarantee:
No-Risk 45 Day 100% Money-Back Guarantee
personally guarantee that if you make a sincere
effort to apply the principles in "The
Key To A Repeating Golf Swing" within
the next 45 days, you'll realize lower scores and
more enjoyment from your game.
if you aren't 100% satisfied, email me your refund
request and electronic payment receipt within 45
days of purchase and you'll be issued a prompt, no-hassle
refund. Hardcopy product must be returned in original,
new condition for full product price refund minus
you've got nothing to lose except strokes off your
Access Right Now to the entire
6 part Digital Package (simple download)
the Hardcopy Package delivered right to
your door step.
Download or Hardcopy (shipped
worldwide, same price!):
like Instant Access to
the complete digital package (immediate simple
like the new 130 page Hardcopy Manual delivered
to my door step along with the additional, simple
74 only $33
to Cart (Digital Package)
New Edition Package Price is a Limited Time Northern
Trust Tournament Special!
advantage of this incredible offer and
receive your complete 6 part package including
FREE lifetime “The
Key To A Repeating Golf Swing” manual
also receive unbiased Golf Ball Recommendations from
a US Patent Award Winning Golf Ball Engineer (Bonus #1) with
this special customer offer.
stunning, unbelievable is all I can say."
you will by my e.mail address above I purchased
your Key system and I am amazed by
its immediate change it has had to my swing and
went from 107 for an average round to 90.
Brilliant, stunning, unbelievable is all
I can say.
you so much for your prompt reply and superb
service you have given me, I have just read
the ‘Key’ again, just to refresh
and keep the practice going to improve even
great to be able to grin on the first tee
knowing that I know what MY FRIENDS WOULD
LOVE TO KNOW."
S. - UK
a 41! My best of the year"
about a testimonial... Your
Readers would not believe this. Read
your book Monday evening. Went to back
yard to work on your tips. On Tuesday A.M.
worked in my net on theory. Tuesday evening
at league shot a 41! My
best of the year (4 strokes off my average).
All this within 24 hours.
Thanks so much."
Carl W. - Kentucky, USA
Note: (this gentleman is 72 years young)
best golf book I have ever read"
you so much for your comprehensive response
to my golf ball recommendation request. I
am very impressed...
read your wonderful e-book “The Key
to a Repeating Golf Swing” this weekend,
and found it to be the best golf
book I have ever read (out of probably
40 or 50 of them).
job! And I’ll be recommending you to
friends – although not the ones that
I am currently playing for money!!"
J. - Saudi Arabia
Golf® is a Paypal
the Author Questions?
Copyright © 2019 Robert
Cotter Instant Golf® All
Rights Reserved Instant
names, trademarks, and images are copyrights of their respective