There is the 2.400" 220 Howell. From the creator, author Ken Howell
1. The .220 Howell is a factory load, not a wildcat.
2. Loaded ammo and factory brass are available ...
3. ... or form from .25-06, .270, .280, '06 cases.
4. Over-all length with 75-grain Hornady A-Max seated 0.555 inch is 2.925 inches.
5. Optimum twist for this bullet is one turn in eight or nine inches.
6. More info at
| American Hunting Rifles | Quality, Reliability and Accuracy
7. Optimum powders: Ramshot Magnum, IMR 7828
8. approximate performance with Ramshot Magnum, 26-inch barrel (exact performance in unknown rifle is impossible to predict):
-- 50.0 gr, ~ 3,200 ft/sec, ~ 39,000 lb/sq in.
-- 54.5 gr, ~ 3,600 ft/sec, ~ 52,500 lb/sq in.
-- 54.9 gr, ~ 3,650 ft/sec, ~ 54,000 lb/sq in.
Steps in forming case:
1. Anneal shoulder and upper body.
2. Shove outer shoulder back with 8x57mm Mauser sizer die.
3. Shove more shoulder back with 7x57mm Mauser sizer die, backed-off [by amount I don't recall exactly].
4. Shove more shoulder back with .257 Roberts sizer die, backed-off [by amount necessary)
5. Size in .220 Howell sizer.
6. Trim to 2.400 inches and deburr mouth.
7. Anneal neck and shoulder.
link with discussion on 24 hr campfire:
220 Howell | Ask The Gunwriters | 24hourcampfire