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Better check the Winchester Site again.
Rem 700,
The 220 Swift and the 22-250 pushing the same bullet (and I meen the EXACTLY same bullet will have the exact same ballistic co-efficient. The only way for the BC to be different is to use two (2) different bullet designs.
If these bullets are the same (i.e., same dia. weight, length & design) (an example would be two 55 grn ballistic tip bullets for that caliber) then the BC will be exactly the same.
If for example you are comparing a Nosler Ballistic Tip bullet with a Sierra BTHP Match then the BC will be different.
My last words on the matter.
Bulletpusher "BBRSSC #1"
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