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Three Callaway GBB Epic drivers appear on USGA Conforming Club List

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Three new Callaway drivers have appeared on the USGA’s Conforming Club List: the GBB Epic, the GBB Epic Star and the GBB Epic Sub Zero.

Callaway isn’t commenting on the new Great Big Bertha (GBB) drivers at this time, so we can’t officially confirm or deny any details about the new drivers. We do anticipate that one or more of the driver models could be in play this week at the Hero World Challenge in the Bahamas, however, where they will be permitted for us. We also can point out a few things based on the USGA’s black-and-white photos.

GBB Epic

Callaway_GBB-Epic

GBB Epic Star

8_Nov_mono02

Based on the photos, it appears the GBB Epic and GBB Epic Star are virtually identical, with the exception being the lack of an adjustable hosel on the GBB Epic Star.

Both drivers appear to use a technology called “Jailbreak,” which is highlighted on the front of the driver’s sole. The technology is rumored to connect the sole and crown of the drivers, adding reinforcement that improves energy transfer.

On the other end of the sole is a sliding weight that enables golfers to select a draw, fade or neutral trajectory bias. There are also what seem to be carbon fiber inserts on the soles of all three driver models. Carbon fiber is lighter than titanium, and its use presumably enhanced the ability of Callaway engineers to optimize the weighting of the driver heads for improved performance.

GBB Epic Sub Zero

Callaway_GBB_Epic_Sub_Zero

Instead of a sliding weight track, the GBB Epic Sub Zero has two adjustable weights — one on the front of the sole, and one on the back. That reminds us of Callaway’s XR ’16 Sub Zero driver, which is the company’s current ultra-low-spin driver. It design targets better golfers, and was used in 2016 by Phil Mickelson.

The Sub Zero got its name from its center of gravity position (CG), which Callaway says is below the neutral axis line, or “sub zero.” The XR ’16 Sub Zero uses a what Callaway called a Carbon Triax Crown, an extremely thin, lightweight composite material on the top of the driver that the company said enabled its sub zero CG location.

What are GolfWRX Members saying about the new drivers? Join the discussion in our forum. 

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18 Comments

18 Comments

  1. westphi

    Dec 4, 2016 at 12:56 pm

    When is this going to be released in stores?

  2. Red Regal

    Nov 29, 2016 at 6:42 am

    Callaway the new Taylor Made with so many releases.

  3. PapaBear

    Nov 29, 2016 at 2:46 am

    Haven’t been this excited since the Cobra 370U was released!

  4. KJ

    Nov 28, 2016 at 9:02 pm

    A lot of the comments, so true. I buy a new driver amount every 3 years. I typically buy a model that’s one year old and half the price of the original in very good shape.

  5. erlybrd

    Nov 28, 2016 at 6:27 pm

    What? Looks just like 915 D4 head!!

  6. Blade Junkie

    Nov 28, 2016 at 3:31 pm

    Another bottle of Snake Oil please Bartender !

  7. B. Parsons

    Nov 28, 2016 at 1:16 pm

    The Korean YouTube video showed these in detail. I’m sure cally will try their best to have it pulled, but it’s still out there. Search for it on naver or another Korean search engine.

  8. Dave R

    Nov 28, 2016 at 12:21 pm

    What I can’t believe it more new drivers, what will they think of next

  9. Jordan

    Nov 28, 2016 at 11:14 am

    Wait, they’re coming out with an adjustable 915 driver? Color me intrigued…

  10. Clay

    Nov 28, 2016 at 10:30 am

    I can’t believe no one has speculated that the bonded hosel design was made for Tiger. Are the “Tiger is buying TM” rumors so strong that no one wants to start a new rumor about Tiger signing with Callaway? Fine, I will start the rumor. The GBB Star is made specifically for Tiger and will not go to market. I have zero evidence but I know some people that know some people that robbed some people and they said it is true.

  11. Michael

    Nov 28, 2016 at 9:33 am

    The Epic Star has my attention. Will this be a non-adjustable model that is in the $399 range? Would they want to compete with possible Fusion sales?

  12. cgasucks

    Nov 28, 2016 at 9:04 am

    Jailbreak technology!??! What is that?? Does it mean if you pay someone to “unlock” it you remove the USGA COR restriction!??!

    • Desmond

      Nov 28, 2016 at 9:23 am

      You need to read the EPIC thread

      • Desmond

        Nov 28, 2016 at 9:24 am

        … or just the descriptions above. Works wonders.

  13. Fozzie Bear

    Nov 28, 2016 at 8:50 am

    Oh, Mizuno Fast Track is back. 🙂

    • DB

      Dec 2, 2016 at 12:49 am

      Man, I just saw a Mizzy Fast Track at GolfMart for like $30.
      If Callaway says this technology is a game changer then I’m going back to get that Mizuno tonight!

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Equipment

WRX Spotlight: Swag Golf proto putter

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Product: Swag Golf proto putter

Pitch: From Swag “Swag is the brand that isn’t scared to push the limits in a conservative sport that isn’t evolving to meet changing styles. We like to listen to music on the course, we want to be bold, we love having fun, we love golf, and we’re going to express that both on and off the course. We aren’t going to try to sell you on how great our proprietary materials are and we don’t need to rely on clever marketing to sell more. We’re a no BS company. What matters is that our putters feel good and in turn make you feel good when putting. We have some crazy ideas, we love to tinker, and we experiment on how to perfect everything we do. ”

Our Take on the Swag Golf Proto putter

Though relatively new, Swag Golf has been making a big splash in the industry for their high-end and striking headcovers and accessories. Perhaps less talked about when it comes to the company is their putters – something which I feel is likely to change after testing out their prototype rainbow finish flat-stick.

The putter is beautiful from whatever angle you look at – but especially at address. Extremely smooth lines, and with full-shaft offset, the blade’s shoulders and bumpers are flawlessly balanced to frame the ball and let the putter sit perfectly square. The single line alignment aid enhances the look and is positioned right in the center of the blade’s sweet spot, while the CNC milled flat-stick delivers perfectly smooth edges – noticeably on the neck for a sublime and soft profile.

With a head weight of 354g, the putter from Swag feels exceptional in your hands over the ball. Every detail matters when investing in a premium putter, and the sensation of the stable and firm feel of the flat-stick as well as there being no wavering of the head, makes the putter feel like an extension of your body when standing over a putt.

The sound and feel of the putter is an area where Swag has knocked it out of the park. With a fly milled face from 303 Stainless Steel, the flat-stick delivers an incredibly soft feel at impact.

No vibration is felt on impact, even on long-distance putts. It never feels like your hitting the ball but more caressing it, which is a pleasant sensation when putting from downtown. What you get in terms of sound at impact is a low, deep pitched note from a putter which rolls beautifully on its axis and produces no vibration on slight mis-hits.

To nitpick, the company’s “black mid pistol tackified kangaroo leather grip” took some getting used to. Initially, it took a little away from how impressive the flat-stick feels in your hands, but it gradually becomes more comfortable.

Overall performance-wise though, the putter from Swag provides everything you could hope for from a high-end putter. Exceptional feel at address, painfully attractive profile and precision at impact.

As of now, the company boasts self-confessed “putting nerd” Kevin Streelman as their PGA Tour ambassador. Streelman is currently gaming the brand’s Handsome Too proto, and after experiencing the Swag rainbow proto for myself, the highest compliment I can give is that I would be surprised if he (and PGA Tour newcomer Rhein Gibson) are still the only Tour pros to game one of the brand’s flat-sticks in 12 to 24 months time.

In terms of an Anser-style putter, Swag packs a hefty punch with their numerous offerings. While I personally love the eye-catching rainbow finish (which has been blasted to remove some of the boldness), I realize it’s not for everyone. However, the company has plenty more traditional finishes on their array of flat-sticks, which you can find on their website here.

Whatever finish you prefer your putters to come in though, it’s unlikely that any department of Swag’s flat-sticks will leave you disappointed.

 

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New Mitsubishi Chemical ZF shaft in play at the Tour Championship

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Even after winning just a week ago, Justin Thomas has put a new MCA Diamana ZF-Series shaft into play for the Tour Championship and FedEx Cup Final this week at East Lake Golf Club. JT is using the 60g TX version in his 9.5-degree Titleist TS2 driver (see Thomas’ BMW Championship-winning WITB here).

MCA has confirmed the new shaft and given us some great information on why it is are adding this fourth profile to the Diamana line—something the company has never done before.

The new Diamana ZF has taken the easy loading bend profile from the BF-Series and tweaked it in certain spots along the length to further maximize the design and find greater performance for players across swing speed ranges.

“The result is a profile that makes ZF a little more explosive and easier to accelerate.” -Mark Gunther, Vice President of Sales and Marketing for MCA GOLF.

Like the other shafts in the Diamana Fourth Gen. Series, the Diamana ZF shafts owe their stiffness and stability to two unique technologies. First: the MCA-developed MR70 carbon fiber material, and the second: Boron fiber. MR70 is found in both the butt and tip sections of the shaft and is 20 percent stronger than conventional materials, with a 10 percent greater modulus (a measure of stiffness). These designs have additional strength thanks to Boron fiber in the tip section to create the exact EI curve desired.

When you compare the new ZF to Diamana BF-Series, the ZF-Series shafts are a slightly stronger profile and built to have increased stability in both the butt and tip sections. They feature a softer, more active middle for better energy transfer and clubhead acceleration.

A cool feature for those looking to get a bit more distance but are on the lower end of the swing speed spectrum: There will also be a 40-gram version of the ZF, which is the lightest shaft of the fourth generation Diamana family.

“We’re extremely happy to have a 40g option within Diamana™ ZF,” says Gunther. “This opens the performance benefits of these unique Mitsubishi Chemical materials to a whole new range of players who prefer to play an ultra-lightweight shaft.”

Mitsubishi Diamana ZF-Series Availability and Specs

Diamana ZF-Series will be available September, 13 2019 at MCA GOLF authorized retailers and dealers nationwide, with a suggested retail price of $400.

Weights and flexes

  • DIAMANA ZF-Series 40 (R2, R, S Flex)
  • DIAMANA ZF-Series 50 (R, S, TX Flex)
  • DIAMANA ZF-Series 60 (S, TX Flex)
  • DIAMANA ZF-Series 70 (S, TX Flex)
  • DIAMANA ZF-Series 80 (S, TX Flex)
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Forum Thread of the Day: “Are 919 forged irons really that good?”

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Today’s Forum Thread of the Day comes from 9ironiscash who asked fellow members what they thought about Mizuno’s 919 forged ironsOur members dish out their experiences gaming the irons, with the majority of WRXers answering with a resounding yes to 9ironiscash’s original question.

Here are a few posts from the thread, but make sure to check out the entire thread and have your say at the link below.

  • Gmack1973: “I think the 919 forged are great irons. I play to a handicap of 4 and think I’m not a bad ball striker. I had the tours 6-pw, and they were great but a bit unforgiving if you don’t get them out the middle. I now have 919 forged 4 – PW and couldnt be happier. They have the Nippon Modus 120 stiff shafts.”
  • Gofguy224: “They are great irons! Had them for about a month and I’ve already shot 3 of my lowest scores ever! Very forgiving and they feel buttery soft
  • chjyner: “The whole 919 range is probably the best on the market “
  • PowerCobra98: “I like them. Moved from Apex 19’s into 919 Forged. I’ll likely be looking at a set of MP20 HMB’s though.”

Entire Thread: “Are 919 forged irons really that good?”

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