Sentence:  Barrel weights <WSD>vary</WSD> sensibly with the various calibers available , and these include the standard bores ( about $ 165 ) plus the Magnums ( around $ 170 ) ; the latter include the .264 , .300 H + H , .338 , .375 and .458 . 
Meaning of the word marked with <WSD> tags:  be subject to change in accordance with a variable