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307 Winchester

New drawing Coming

Introduced by Winchester in 1982, for chambering in the 1894, the 307 Winchester is merely the 308 Winchester with a 30-30-diameter rim and loaded with blunt bullets that are safe in a tubular magazine at an overall length of about 2.55-inches.

The 307 came about three decades too late. Since WW-II, if not before, gunsmiths had been altering the 1894 Winchester to work with a wildcat round using a shortened 30-40 Krag case to give improved ballistics. Considerable demand had long existed for increased performance in 1894 chamberings.

But, by the time Winchester finally got around to answering that call, with the 307 and 356 chamberings, lever-action rifles were falling out of favor. Sales were rather dismal. Both rounds were soon dropped from both the Winchester and Marlin catalogues.


Nevertheless, the 307 Winchester had something to offer. If it were still chambered, when loaded with the best components, it would come close to matching 308 Winchester performance in a traditional lever-action rifle.

As with all cartridges used in guns with a tubular magazine, a properly applied crimp can smooth and ease chambering and a crimp is critical to lock the case mouth into the cannelure and thereby prevent recoil and chambering forces from driving the bullet into the case. In some instances, a roll crimp might be the best option but the Lee Factory Crimp Die usually does a better job and the crimp it applies will not damage a cast bullet as chamber pressure drives that from the case.

Heritage of this case dates to the 1870s with the introduction of the 40-70 Ballard case.


The text associated with the cartridge description reflects opinions and conclusions of the author, M.L. (Mic) McPherson. Lee Precision and its employees do not necessarily either agree or disagree with any of his comments. We present these with due deference to his recognized expertise in the firearms field. His acumen extends to handloading and all aspects of ballistics - internal, external, and terminal.
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