D300 vs King OS vs Big Bertha OS: An Oversize Battle

d300 vs king os vs big bertha os

Hollow construction, oversized heads, great forgiveness, and massive distance. If that’s what you’re after in a set of irons, any of these three choices are great. The Wilson Staff D300, Cobra King OS, and Callaway Big Bertha OS irons are meant to be distance machines. Each iron uses unique construction to accomplish the distance goal and provide tons of forgiveness.

We’re giving you an overview of each club, comparing the D300 vs King OS vs Big Bertha OS and their construction.

D300 vs King OS vs Big Bertha OS

Wilson Staff D300

The Wilson Staff D300 irons, despite being very large, feature the most traditional look at address. The irons feature with a mid-sized top line and a classic, rounded look. Around the club’s face are “Power holes,” filled with TE031 Urethane. This is one of Wilson’s secrets to creating extreme distance. The holes allow 76% of the face to be disconnected from the body of the iron, letting the face to flex at impact. The Power Holes are very progressive, almost sci-fi look on the club that could require some getting used to.

wilson staff d300 iron

At address, the cavity of the D300 sticks out of the back and can be seen in the 4-6 irons at address. This boosts the confidence if you like your irons to have a larger sole. Finally, at the heel and toe of the sole are two weight pods consisting of 60 grams of 17-4 stainless steel. These pods aid in forgiveness and give a high launch despite the strong lofts of the clubs.

Cobra King OS

With the King OS, Cobra goes with the idea that bigger is better when it comes to forgiveness. These irons feature a long, completely hollow head with a rather large top line. A big plus with these irons is the circular alignment pattern on the face. Equalling the size of a golf ball, it really aids in focusing the player on the center of the club, instilling confidence. The King OS irons also use the PWRShell face, with a wrap around design on the leading edge so that the joint line of the fact is on the sole. This is Cobra’s approach to providing more face flexing at impact and more distance and forgiveness.

king os iron face

Another nice thing about the Cobra King OS irons is how the offset and club head size gets smaller as you work your way from the long irons to the wedges. This prevents a boxy, clunky look in the wedges and provides more control. In fact, the Gap wedge resembles a wedge targeted towards lower handicap players.

Lastly, let’s talk about the grooves on the King OS irons. The grooves on the 4-6 irons are V-shaped and the short irons feature U-shaped grooves. Why would Cobra design them like this? Having different groove shapes gives your shots the best spin for the loft.

Callaway Big Bertha OS

Callaway’s Big Bertha OS irons feature confidence-inducing thick top lines. The iron heads have a semi-hollow construction and the Callaway Exo-Cage. The Exo-Cage consists of two vertical struts on the back of the head, providing stiffness for support. The Exo-Cage design also let designers move more weight around the perimeter for forgiveness, and places the CG lower for high launch.

 Big Bertha OS Irons

The Hyper Speed Face Cup design wraps the entire face around the club before getting attached. Designing the face like this lets the clubface flex at impact over a larger portion of the club face, creating ball speed. In other words, mishits aren’t penalized as bad.

Of the three clubs, the Big Bertha OS irons appear the bulkiest at address. The large look makes them appear very easy to hit and it just feels like they are going to go a mile.  Like the King OS irons, the Big Bertha OS irons get progressively smaller from long irons to short irons. Finally, Callaway maintains high launch angles using Tungsten weights positioned at different points in the different irons. The position of the weights gives you more forgiveness in long irons and more control in short irons.

In The End…

All three of these clubs provide extreme distance and forgiveness for the higher handicap player. Choosing between D300 vs King OS vs Big Bertha OS comes down to looks and how they perform for you. Head out for a fitting and see what a difference these irons can make.

Our review of one of these irons and others:

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Rudi Fann

Rudi Fann has been a Class “A” member of the PGA of America since 2008. He began his career in 1998 as the Assistant Golf Professional at Wake Forest Golf Club in Wake Forest, NC. In 2002, Rudi accepted a similar position at Rio Mar Country Club in Rio Grande, Puerto Rico. He spent a year there before moving to Nipomo, CA where he worked at Blacklake Golf Resort. Over the next 10 years, he worked his way from Assistant Golf Professional to Head Golf Professional and finally Director of Golf Operations. In his time at Blacklake, Rudi devoted much of his time to running tournaments and other activities in order to create a social atmosphere at the club. After Blacklake, Rudi spent one year as Head Golf Professional at Paso Robles Golf Club before deciding to return home to North Carolina. Since returning to North Carolina, Rudi has worked with the First Tee of the Triangle helping to instill life skills and core values through the game of golf to local youth.