Proto-Concept C05 vs Proto-Concept C07
Side-by-side factory specifications. Differing values are highlighted.
Specification comparison
| Club | C05 loft | C07 loft | C05 lie | C07 lie | C05 length | C07 length |
|---|---|---|---|---|---|---|
| 4 | — | 22 | — | 61 | — | 38.5 |
| 5 | 25 | 25 | 61 | 61.5 | 38.25 | 38 |
| 6 | 28 | 28 | 61.5 | 62 | 37.75 | 37.5 |
| 7 | 32 | 31 | 62 | 62.5 | 37.25 | 37 |
| 8 | 36 | 35 | 62.5 | 63 | 36.75 | 36.5 |
| 9 | 40 | 39 | 63 | 63.5 | 36.25 | 36 |
| PW | 45 | 44 | 63.5 | 64 | 35.75 | 35.75 |
Highlighted cells differ between the two sets. Lofts and lies are factory standard.
Lofts compared
- C05
- C07
What the differences mean
At the 7-iron, the C05 is 32° and the C07 is 31°, a 1° gap. Each degree of loft is worth roughly 3 to 4 yards of carry at the same swing speed, so the C07 should carry roughly 3 to 4 yards further with that club, on a slightly lower, shallower flight than the C05. Across the 6 clubs both sets share, the C07 averages 0.7° stronger, with the largest gap at the 7-iron (32° vs 31°). The pitching wedges are 45° and 44°; the stronger one leaves a 6° jump to a 50° gap wedge, which matters when planning wedge gapping. Beyond loft, the C05 7-iron sits 0.5° flatter (62° vs 62.5°), which nudges start direction slightly right for a right-hander; the C05 7-iron is 0.25 inches longer (37.25" vs 37").
The sets are built differently: the C05 runs 5-iron to PW (6 clubs), the C07 4-iron to PW (7 clubs).
The C05 is a players distance iron and the C07 a game improvement iron, so they sit one step apart on the forgiveness scale. The C07 is the more forgiving design, with a wider sole, more offset and more perimeter weighting for roughly 10 to 25 handicaps. The C05 trades some of that for a more compact head, thinner topline and more control over flight and shape, which suits roughly 5 to 15 handicaps who want extra distance from a compact head.
The C05 is listed as pocket cavity (forged SAE8655 face welded to S25C body) and the C07 as pocket cavity (forged SAE8655 face on S20C body, 3-level face-thickness variation). With the build method this similar, differences in feel come down to head size, sole width, topline and offset rather than how the heads are made.
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 C07 is the stronger-lofted set — up to 1° stronger than the C05 on matching clubs. Expect longer carry per numbered iron but a flatter descent angle; gapping at the wedge end is where that shows up.
Both charts are reproduced in full on their own pages: Proto-Concept C05 specs and Proto-Concept C07 specs.
Frequently asked questions
Is the Proto-Concept C05 stronger lofted than the C07?
No. The C07 is the stronger-lofted set: its 7-iron is 31° against 32° for the Proto-Concept C05, 1° stronger and worth roughly 3 to 4 yards of extra carry.
What is the loft difference between the Proto-Concept C05 and C07?
At the 7-iron the difference is 1° (32° vs 31°). The largest gap on a shared club is 1° at the 7-iron, and 4 of the 6 shared clubs differ.
Which is better for higher handicap golfers, the Proto-Concept C05 or the C07?
The C07. As a game improvement iron it is the more forgiving design, suited to roughly 10 to 25 handicaps. The Proto-Concept C05 is a players distance iron, better suited to roughly 5 to 15 handicaps who want extra distance from a compact head.
Do the Proto-Concept C05 and C07 have the same lie and length?
Not exactly. At the 7-iron the Proto-Concept C05 is 62° lie and 37.25 inches, the C07 62.5° and 37 inches. Both can be bent or built to your own fit.
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