220 Wotkyns-Wilson Arrow
Historical Notes:
The 220 Wotkyns-Wilson Arrow was the work of Grosvenor Wotkyns and L.E. Wilson
and the 220 Swift
with the shoulder angle increased from 21 degrees to 30 degrees. It dates back
to the 1940's. Cases are made by reforming unfired 220
Swift brass in full length sizing dies. Because of the steeper shoulder
angle, standard 220
Swift ammunition will not fully enter into the Arrow chamber and cases
cannot be made by fire-forming.
General Comments:
The 220 Wotkyns-Wilson Arrow represents an effort to remedy a problem by making
a minor change in cartridge configuration. Factory 220
Swift cases had the reputation of lengthening after only a few firings,
required frequent trimming. Changing to a steeper shoulder angle reduced the
brass flow into the neck and made for longer case life. The Arrow was a popular
benchrest cartridge and also a true long range varmint number. It delivers
ballistics comparable to the 220 Swift.
Source: Cartridges of the World
| 220 Wotkyns-Wilson Arrow Reloading Data | ||||
|---|---|---|---|---|
| Bullet (grs.) | Powder / (grs.) | MV | ME | Source |
| 45 SP | H-450 / 47.0 | 3985 | 1580 | n/a |
| 50 SP | H-450 / 46.0 | 3850 | 1640 | n/a |
| 50 SP | IMR 4064 / 40.0 | 3915 | 1695 | n/a |
| 55 SP | H-380 / 39.0 | 3510 | 1500 | n/a |
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