CALLAWAY BIG BERTHA OS
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”
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 6.4m further than our test average. Impressive.
VERDICT: If your game needs full-on forgiveness, this is a great option. How all that forgiveness is rolled together into a design that’s much more appealing than the original is very impressive.