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Roughing reamer versus finish reamer

 
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  #1  
Old 11-17-2013, 09:00 PM
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Roughing reamer versus finish reamer

Is it possible to chamber a rifle with just a finish reamer from A to Z or does a roughing reamer have to be used first? Are there any advantages to a solid pilot versus a rotating pilot or vice versa?

Thank you for any advice.
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Old 11-17-2013, 11:04 PM
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Re: Roughing reamer versus finish reamer

Most of the time the finish reamer is all anyone uses. People use roughing reamers to lessen the load on the finish reamer when they chamber a lot of barrels in the same caliber.

Solid pilot reamers usually come .001 under size on the pilot and removable pilots can be had in any size but commonly they are .0005" under bore size. So they are typically tighter and guide the reamer truer to the bore.
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Old 11-18-2013, 08:58 AM
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Re: Roughing reamer versus finish reamer

Quote:
Originally Posted by Michael Eichele View Post
Is it possible to chamber a rifle with just a finish reamer from A to Z or does a roughing reamer have to be used first? Are there any advantages to a solid pilot versus a rotating pilot or vice versa?

Thank you for any advice.

In my opinion, using a finishing reamer all the way is best. roughing reamers are used in
production operations where speed is the objective. They are under sized and the chamber MUST
be finished with a finish reamer.

With a flushing system or frequent cleaning, the reamer will last/stay sharp for many chambers(I
have reamers that have cut 10+ chambers that will still cut you if you run your hands down the
flutes the wrong way).

I have repaired chambers that were roughing reamer only chambers and there was no throat and the chamber was not concentric with the bore and had to be set back to clean it up. (These were
new rifles that showed pressure at lowest loads and no accuracy and someone decided that a roughing reamer was good enough to do a chamber.

As to the solid pilot or a removable piloted reamers, I use both and as long as the solid pilot reamer is a good fit (Less than .0005 clearance) I can see no difference, I use a high temp grease on both type of pilots to prevent any metal to metal contact with the bore to prevent any marking of the lands by ether pilot.

Where accuracy is the goal and time is not a finishing reamer all the way is the best IMO.

J E CUSTOM
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Old 11-22-2013, 07:00 PM
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Re: Roughing reamer versus finish reamer

How do you get the grease to stay if you are using a flushing system?

As far as roughing reamers I would venture to guess no accuracy smith uses them.
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  #5  
Old 11-29-2013, 01:22 PM
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Re: Roughing reamer versus finish reamer

I called and asked this question at Brownell's 10 years ago.

I got pretty much the same answer as has been posted above.

Now I have a dozen+ reamers and they are all finish reamers.
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