CNC

[XGibsonX]

Hopefully you guys can set a confused fellow on the right path: explain something to me. . . I was reading on another forum and guys were going back and forth about CNC bullets versus more "modern" monolithic bullets. Anyway I thought that CNC was just a machining or lathing process? And that CNC machining/lathing was used for older bullets as well as newer bullets. I assume that monolithic are like solid copper VLD (secant ogive?) with low SD but rather high BC. That's what they were saying but to me it seems BC is dependent on SD. The higher the SD the higher the BC for a given caliber, however, I suppose the coefficient of form could be much lower and since it is squared that that would explain why that SD can be low and BC still high? I am confused. Yeah, likely I have mixed multiple concepts here.

I guess the real question is what do folks really mean by CNC bullets? It was used as if it picks out the older style bullets.

Addenda: I do apologize for my ignorance.

Thanks

 

[Jeff H]

CNC just stands for Computer Numerically Controlled. I'm not exactly sure what would be the definition of a CNC bullet, but I would guess it would be made by a CNC controlled lathe, as opposed to drawing a copper jacket and swaging the lead core into it.

If the equipment is good enough, CNC equipment is capable of amazing accuracy and repeatability, of course, so are other methods.

 

[rcmodel]

C&C means Cup & Core bullet.
CNC might also mean Cup N Core too I suppose?

In other words, a conventional jacketed bullet as opposed to a solid copper bullet.

Whatever, it has nothing to do with CNC (Computer Numerically Controlled) machining.

rc

 

[XGibsonX]

Thank you, Jeff.

 

[XGibsonX]

rc:

That is the ONLY possible explanation that makes sense in my mind. I am obliged.

The dangers of trying to understand shorthand, I reckon. If correct, everything is now clear to me. Had to mean cup 'n core.

Two different sites guys referenced "older tech" bullets as cnc bullets. Confusing to the uninitiated. That ampersand would have been a godsend for me to understand.

 

[56hawk]

This company does make CNC bullets: http://lehighbullets.com/index.html I just bought some and they look pretty awesome. Don't know if that was what they were talking about though.