Proto-Concept C01 vs Proto-Concept C05
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | C01 loft | C05 loft | C01 lie | C05 lie | C01 length | C05 length |
|---|---|---|---|---|---|---|
| 5 | 25 | 25 | 60.5 | 61 | 38 | 38.25 |
| 6 | 28 | 28 | 61 | 61.5 | 37.5 | 37.75 |
| 7 | 32 | 32 | 61.5 | 62 | 37 | 37.25 |
| 8 | 36 | 36 | 62 | 62.5 | 36.5 | 36.75 |
| 9 | 40 | 40 | 62.5 | 63 | 36 | 36.25 |
| PW | 45 | 45 | 63 | 63.5 | 35.5 | 35.75 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- C01
- C05
What the differences mean
Every club the two sets share has exactly the same loft, starting with a 32° 7-iron. On paper there is no distance or trajectory difference: with the same swing, a 7-iron from either set should launch and carry about the same. The real differences are in how the heads are built, how they look at address and how they feel at impact, none of which a spec table can show.
The C01 is a blade iron and the C05 a players distance iron, so they sit 2 steps apart on the forgiveness scale. The C05 is the more forgiving design, with a wider sole, more offset and more perimeter weighting for roughly 5 to 15 handicaps who want extra distance from a compact head. The C01 trades some of that for a more compact head, thinner topline and more control over flight and shape, which suits low single-digit handicaps who strike the ball consistently.
The C01 is listed as forged one-piece muscle back with forged-in titanium rod (5-7 irons) and the C05 as pocket cavity (forged SAE8655 face welded to S25C body). The C01's muscle-back shape keeps mass directly behind the strike for feedback and control, where a cavity spreads it to the perimeter for forgiveness.
Both sets were introduced in 2020, so this is a choice between two models from the same lineup rather than an upgrade: Proto-Concept designed them to sit side by side for different players.
Which should you choose?
The C01 and C05 share the same lofts on every club on file, so the difference is in head construction, feel and forgiveness rather than trajectory.
Both charts are reproduced in full on their own pages: Proto-Concept C01 specs and Proto-Concept C05 specs.
Frequently asked questions
Is the Proto-Concept C01 stronger lofted than the C05?
No. Both have a 32° 7-iron and the same loft on every club they share, so neither is stronger lofted. The difference is in construction and feel.
What is the loft difference between the Proto-Concept C01 and C05?
There is none. Every club both sets include has the same loft, including the 32° 7-iron.
Which is better for higher handicap golfers, the Proto-Concept C01 or the C05?
The C05. As a players distance iron it is the more forgiving design, suited to roughly 5 to 15 handicaps who want extra distance from a compact head. The Proto-Concept C01 is a blade iron, better suited to low single-digit handicaps who strike the ball consistently.
Do the Proto-Concept C01 and C05 have the same lie and length?
Not exactly. At the 7-iron the Proto-Concept C01 is 61.5° lie and 37 inches, the C05 62° and 37.25 inches. Both can be bent or built to your own fit.
Shop both models
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