Callaway Big Bertha OS Irons Review

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Tech: A lightweight, strong Exo-Cage frame inside the head eliminates inefficient weight, meaning Callaway’s engineers had more weight to position to influence forgiveness.

We say: The construction method of this latest model is nothing like the very successful originals. The OS’s new cage head has parts welded onto a very lightweight frame to create a seriously forgiving iron, unlike others. Simon was a big fan of the very tidy shape and chunky top edge, and from a loft 1.5° weaker than our longest iron the OS posted a ball speed 3mph faster and carried shots 7 yards further than our test average. Impressive.

Verdict: If your game needs full-on forgiveness this is a great option. It’s head construction means weight is removed from inefficient areas and positioned to make a difference. How that forgiveness is rolled together into a design that’s much more appealing than the original is impressive and opens up the OS to a very wide audience.   

www.callawaygolf.com

Availability: 4-PW, AW, SW (stock set 4 – PW or 5-SW)

Stock shaft: True Temper Speed Step 80 (s), UST Recoil ES 460 (g)

7i loft/length: 30° / 37.25”