Definition of rifling in English:

rifling

Line breaks: rifl¦ing
Pronunciation: /ˈrʌɪflɪŋ
 
/

noun

[mass noun]
The arrangement of spiral grooves on the inside of a rifle barrel: he could clearly see the rifling of the bore
More example sentences
  • There's no rifling in the barrel, and you call it a rifle?
  • The foremost portion of this auxiliary chamber incorporates many small rifling grooves to just stabilize the bullet before it engages the bore.
  • In their six grooves, Colerain barrels feature round bottom rifling that holds less fowling; square bottomed grooves reportedly retain more fowling.

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verb
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