Re: question about the .280
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If shooters like the .270 Win and/or the .30-06 Springfield, the .280 Rem is close enough to perfect. It shoots as fast and flat as the .270, has higher velocity also. Will handle heavier bullets than the .270 Win also.
The .270 Win is a .30-06 necked down to accept .277" bullets. The .280 Rem is the same case necked to hold .284" bullets and has the shoulder pushed out slightly farther to give slightly larger powder capacity.
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this is not true if you look in any reloading book you will see that the 270 is faster and flatter shooting also has more vel than the 280 in 130,140 150 grn bullets
it also holds more powder than the 280