How do you slug a 5-groove barrel?

[sonny]

Yes, it can be done with Trig but that's a lot of work with only one cup of coffee so far.
I know one of you guys can do this...
Thanks,
Sonny

 

[Aussie44]

Wrap a thin shim stock around the slug ( Not too tight ) A Feeler gauge works well.Measure the shim stock and slug.Subtract double the thickness of the shim and you will have the measurement of the slug.

Ken

 

[sonny]

Thank you, sir. That might just be workable. I'll try it.//// I tried it. Used a 1.5mil feeler gauge, and then also a 0.002" to even out the valleys. Seems like I have a bore diameter than is 0.428". Which, for me, is a good thing, since my cylinder throats are .429". You had a good suggestion.
Sonny

 

[WILL TERRY]

MY TRI-CORNER MIKE DOES A FINE JOB OF MEASUREING THINGS LIKE THAT TO .0001".

I hate quessing about such things as perfection is the only standard [ ....well...except for wimmen...]

 

[Aussie44]

Sonny, Happy to help.

Ken

 

[shovelwrench]

If you use a slug thats 3/4" long, then put the slug in the caliper longways it'll read just fine.

 

[sonny]

I hate quessing about such things as perfection is the only standard [ ....well...except for wimmen...]

I can't fault your logic. I agree.
Thanks, Sonny

 

[sonny]

If you use a slug thats 3/4" long, then put the slug in the caliper longways it'll read just fine.

Verrrrryyy interesting, shovelwrench. I had to think about this one, but yeah...of course. Thanks.
Sonny