Bullets With Cannelure | Without Cannelure
- Thread starter Nick Danger
- Start date
When you crimp too much a cannelure gives a bit of a buffer space to avoid upsetting the lead within the copper jacket.
Thats it.
Thats it.
A cannelure is there so you can crimp the case mouth into the jacket thereby creating a mechanical lock which helps with ignition and bullet setback. Unfortunately a cannelure harms accuracy and that is why match bullets don’t have cannelures.
The cannelure on bullets is actually put there to prevent the bullet from being able to move once seated.
As others have stated, a cannelure with a crimp can degrade the accuracy of a match-grade bullet.
The military insisted that the 77 grain Sierra MatchKing loaded in MK262 Mod 1 have a cannelure. Sierra reluctantly complied with a shallow cannelure.
Sierra 77 grain Tipped MatchKing.
Nosler 77 grain OTM with a cannelure.
Hornady 75 grain OTMs with cannelures.
...
The military insisted that the 77 grain Sierra MatchKing loaded in MK262 Mod 1 have a cannelure. Sierra reluctantly complied with a shallow cannelure.
Sierra 77 grain Tipped MatchKing.
Nosler 77 grain OTM with a cannelure.
Hornady 75 grain OTMs with cannelures.
...
Great infoAs others have stated, a cannelure with a crimp can degrade the accuracy of a match-grade bullet.
The military insisted that the 77 grain Sierra MatchKing loaded in MK262 Mod 1 have a cannelure. Sierra reluctantly complied with a shallow cannelure.
Sierra 77 grain Tipped MatchKing.
Nosler 77 grain OTM with a cannelure.
Hornady 75 grain OTMs with cannelures.
...
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