Throat pics

[DaveTooley]

Just finished up some barrels for an OEM account and was spot checking them. They looked so good I decided to try and get some pics. This 6.5 CM chamber was cut with a carbide reamer which leaves a very good finish. You can't see any machine marks on the leade. Concentricity is perfect.

 

[ShtrRdy]

That's beautiful!

 

[LVLAaron]

I dislike carbide reamers, but the finish is incredible.

Great pics Dave

 

[Will Henry]

That is a very nice finish. I especially like the very clean cut on the lands. Shilen barrel? WH

 

[FrankG]

Typical Dave Tooley work!

Later, Frank
Bartlein Barrels

 

[DaveTooley]

That is a very nice finish. I especially like the very clean cut on the lands. Shilen barrel? WH

Bartlein

 

[DaveTooley]

I dislike carbide reamers, but the finish is incredible.

Great pics Dave

Just curious why you don't like carbide? They do behave a bit differently. Very sharp and not much feed back.

 

[hoz53]

Just finished up some barrels for an OEM account and was spot checking them. They looked so good I decided to try and get some pics. This 6.5 CM chamber was cut with a carbide reamer which leaves a very good finish. You can't see any machine marks on the leade. Concentricity is perfect.

View attachment 1376036View attachment 1376037

those look great

 

[LVLAaron]

Just curious why you don't like carbide? They do behave a bit differently. Very sharp and not much feed back.

My only gripe is how picky they are on speeds/feeds/pressure. The end result is incredible... so I guess it's worth it.

 

[FrankG]

Just curious why you don't like carbide? They do behave a bit differently. Very sharp and not much feed back.

For a reamer/chamber that we only do one here or there...we use HSS reamers...where we use them a lot...we use carbide.

Yes a little more sensitive to use (carbide) but finishes are typically nicer and last longer.

 

[V35]

Looks great.
I can get things concentric and make that part look right, but I do struggle with finish. It is like there is chip welding on the reamer, but there is not. The body portions come out great, just the lands and throat have a rougher than desired look. Maybe I need to get into the pressure flush instead of oiling the reamer and cleaning every .020".

 

[DaveTooley]

Looks great.
I can get things concentric and make that part look right, but I do struggle with finish. It is like there is chip welding on the reamer, but there is not. The body portions come out great, just the lands and throat have a rougher than desired look. Maybe I need to get into the pressure flush instead of oiling the reamer and cleaning every .020".

The finish with HSS reamers will vary some. Under magnification the cutting edge on a HSS reamer looks very rough. Different grinding wheels are used on carbide which leads to a better finish. 50 or so rounds down the barrel and things are smoothed up. Flush systems can speed things up but I'm not sure we get a better finish using them. I take .020" to .040" out on the last pass and am not concerned about chip evacuation.

 

[Jud96]

That looks great! The lands looks like this barrel has ratchet rifling. Something new from Bartlein?

 

[Carl S]

Looks good Dave..that's as good as it gets.

 

[Will Henry]

I usually have to hone all of my reamers just a bit to smooth the edges. The other thing is that the last .020 is fed in very slowly. Still, that picture is of a very nice finish. I wasn't aware that Bartlein was making a ratchet rifled barrel but then, there is a lot I'm not aware of! WH

 

[DaveTooley]

I usually have to hone all of my reamers just a bit to smooth the edges. The other thing is that the last .020 is fed in very slowly. Still, that picture is of a very nice finish. I wasn't aware that Bartlein was making a ratchet rifled barrel but then, there is a lot I'm not aware of! WH

It's not ratchet rifling. At least not that I'm aware of. But hell you never know. Special stuff for special customers. It all adds up to better products for us.

 

[Dusty Stevens]

Still my hero dave!

 

[FrankG]

That looks great! The lands looks like this barrel has ratchet rifling. Something new from Bartlein?

To back up what Dave said....

It's not ratchet rifling. That is 5R it just looks different with how the scope is looking into the barrel. Angle etc....

We don't do ratchet rifling. Never have and never will. Guess I should never say never!? I'll say never in this case.

In ratchet rifling the top of the land is so thin/basically knife edge (depending on how you profile it the lands) in my opinion it's going to work against you in terms of barrel life. Especially on a centerfire gun. There is no meat for the wear.

What types of rifling have we done?

2 groove, 3 groove (don't ask for either of those by the way!), 4 groove, 5 groove and 6 groove and 8 groove conventional in standard calibers.

We've done 4R, 5R, 7R. 7R only on 50cal. The 4R was for some FTR test barrels in 30cal and we did test barrels in 270cal with 4R also. They shot great but had nothing on the 5R so we don't offer it.

From 22cf thru 30cal the standard we do is 4 groove, and 5 groove and 5R.

22RF standard for us is conventional 5 groove.

338cal and up are typically conventional 6 groove or 5R up to 416cal.

50cal are 8 groove or 7R.

 

[LVLAaron]

Hmm.. I'd like 4R 30 cal tubes

 

[Sniperhandle]

To back up what Dave said....

It's not ratchet rifling. That is 5R it just looks different with how the scope is looking into the barrel. Angle etc....

We don't do ratchet rifling. Never have and never will. Guess I should never say never!? I'll say never in this case.

In ratchet rifling the top of the land is so thin/basically knife edge (depending on how you profile it the lands) in my opinion it's going to work against you in terms of barrel life. Especially on a centerfire gun. There is no meat for the wear.

What types of rifling have we done?

2 groove, 3 groove (don't ask for either of those by the way!), 4 groove, 5 groove and 6 groove and 8 groove conventional in standard calibers.

We've done 4R, 5R, 7R. 7R only on 50cal. The 4R was for some FTR test barrels in 30cal and we did test barrels in 270cal with 4R also. They shot great but had nothing on the 5R so we don't offer it.

From 22cf thru 30cal the standard we do is 4 groove, and 5 groove and 5R.

22RF standard for us is conventional 5 groove.

338cal and up are typically conventional 6 groove or 5R up to 416cal.

50cal are 8 groove or 7R.

Hi Frank,

There has been some debate on this forum recently about whether or not the reamer pilot is supported while chambering 5R barrels, What is your opinion on this? I would assume the 4R would not have this perceived problem?