MC303 Forged Cavity Back Iron

Blade feel, Distance, Accuracy

The Grindworks MC303 is the successor to the MC333 irons. Forged from soft carbon steel S20C, the MC303 is precision CNC machined to hollow out the back of the iron creating a deep and wide cavity.

This increases the heads Moment of Inertia, boosting the club head’s resistance to flight distance loss and inaccuracies due to off center impacts. The deep cavity also thins out the clubface improving the spring like effect of the club head.

Like its predecessor, the MC303 features a thickened surface behind the sweet spot which serves to dampen the vibrations at impact. This design makes the MC303 feel more like a muscle back than a cavity back during play.

MC303 Forged Cavity Back Iron Specification

Club TypeCavity Back, Precise CNC milling
Player TypeAverage golfer, better player
CharacteristicBlade feel, Distance, Accuracy
Material and FinishS20C Forged Carbon Steel / Nickel Satin Plating
NoLoft ( ° )
Lie ( ° )
Bounce ( ° )
( mm )
Weight (g)
• CONFORMING to R&A Groove Rule
• Outer Hosel Diameter: 13.5mm
• Inner Hosel Diameter: 9.3~9.1mm (Taper Tip)
• Hosel Depth: 30mm
• Right Handed Only