Complex sentence: The N257115BST bullet retains enough energy to be effective on deer out to while the SXP270S's bullet extends this range out by a further although both the Weatherby's and Winchester's ammunition start with roughly the muzzle energy.
Split into simpler sentences: The N257115BST bullet retains enough energy to be effective on deer out to while the SXP270S's bullet extends this range out by a further. Both the Weatherby's and Winchester's ammunition start with roughly the muzzle energy.