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Old November 1, 2009, 09:24 PM   #1
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What length action for 6.5X.284 Norma?

A cartridge length longer than 2.810" will not function through the magazine and action of any of the .308 Win rifles I load for. If I load with the bullets seated .010 short of the rifling for better accuracy, the guns become single shot rifles.

The .260 Rem. Case length is 2.036" and the maximum cartridge length is 2.800. So the bullet can extend only .764" from the case mouth.
The case length of the 6.5X.284 is 2.170", only slightly longer (.134") than the .260, yet the overall cartridge length is 3.310". That is almost as long as a 270 Win, a "Full Length" Cartridge at 3.34". The 6.5X.284 bullet can extend 1.03" from the case.

The .284 Winchester was designed to be for the "short actions" of the Winchester model 88 lever action and model 100 semi-auto. It seems to require a regular length action such as that of a 30-06 or a .270.

Do any of you own or have experience with the 6.5 X.284 Norma? What kind of rifle and length action is it built on? Are any factory rifles chambered for it?


Last edited by rockydoc; November 1, 2009 at 09:26 PM. Reason: content
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Old November 1, 2009, 09:46 PM   #2
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From what I understand a 6.5X284 is best served by a long action. Some of the match grade bullets get really long and from what I gather they take up some powder room if used in a short action.
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Old November 2, 2009, 02:05 AM   #3
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This is exactly the same issue that plagued the 284 Win in the Win Model 88 and 100 rifles, i.e. the bullets had to be seated very deep in order to feed and function through the short action, thereby negating the potential of the cartridge by seating the bullet deep and reducing case capacity with heavy bullets. In bolt-action rifles, most people opt for a long action for the 284 and its derivative cartridges. Kind of a good news/bad news thing: good news is you can launch a bullet as fast as cartridges based on the 30-06 out of a shorter cartridge, bad news is that in order to do so you have almost the same overall length as a cartridge based on the 30-06 and need a long action to accomodate it.
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Old November 10, 2009, 10:45 AM   #4
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The original 6.5x284 was designed for short action. The 6.5x284 Norma is based on bullets seated further out, thus making a standard action necessary.
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.260 remington , 6.5x.284 norma

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