SHORT THROAT OWNERS--Who's up for chipping in for a reamer to fix our issues?

[NugginFutz]

why can't liberty do the same thing??

They could. They have just chosen not to.

[bwaites]

I have seen several people post up that will refuse to use PTG products after their stance on the Grendel Chamber. You will get more response from those people if you can get a Manson reamer as that is what Lilja and PF have stated they use.

Actually, I believe that both Lilja and Precision are using PTG reamers.

[nincomp]

Mr. Alexander - What, if any issues would be a sign of a chamber at the right at the edge of the allowable tolerance of being too small? Since you are very familiar with the wear pattern of reamers, is there a particular area that reaches the max tolerance (minimum size) before the others?

One of the reasons that I ask these questions is the effect on COAL. I know that the compound throat is designed to work well with many bullets, but I do not know which type of bullet would be affected by a chamber at or slightly smaller than that allowed in the tolerance.

Thanks
Jim

[explorecaves]

Actually, I believe that both Lilja and Precision are using PTG reamers.

You are correct, I didn't remember correctly. Although I do remember they make sure to get the reamer with the compound throat.

[nincomp]

I do not know if anyone is confused by the PTG reamer drawing, but the print uses different nomenclature than most of us on the site. We refer to a compound throat. The print calls the first part of the compound throat the "lead." What can be confusing to those making chamber casts is that the rifling can be seen well before the end of this "lead."

[Lead Chucker]

I'll pony up with you for reamer if we can get everything in place. Sound good.

[JASmith]

I do not know if anyone is confused by the PTG reamer drawing, but the print uses different nomenclature than most of us on the site. We refer to a compound throat. The print calls the first part of the compound throat the "lead." What can be confusing to those making chamber casts is that the rifling can be seen well before the end of this "lead."

Another subtlety about the PTG drawing is that it specifies SAAMI diameters with a + and - tolerance while the SAAMI spec has the minimum diameter the line and the maximum diameter .002" larger. That means that a reamer cut to the PTG drawing has the potential of being a bit tight.

[WildBill3/75]

Update.
Talked to Manson, PTG, and JGS

Manson-very nice to talk to and answered all my questions. 6months wait. H
JGS talked to Kerry also very nice to talk to, turned me on to the suggestion of using a standard 6.5 grendel reamer and have the cutters dulled from shoulder and below.
Carbide in stock $220
HSS 8 week wait $200
PTG--still would have to talk to Dave tomorrow but around $138 for HSS

[WildBill3/75]

Well I decided to just place an order with JGS for the HSS reamer with the 8 week wait.
Anyone interested in sharing some costs and passing it around send me a PM or post in here.

[waveslayer]

Well I decided to just place an order with JGS for the HSS reamer with the 8 week wait.
Anyone interested in sharing some costs and passing it around send me a PM or post in here.

If I knew how to ream a barrel I would do it!

[Lead Chucker]

You know im in WB per PM. Can anyone cofirm that the Liberty/Stoner barrels have the compound throat for sure?

[waveslayer]

You know im in WB per PM. Can anyone cofirm that the Liberty/Stoner barrels have the compound throat for sure?

the Liberty does, I have one and had it scraped. There has been a lot of chatter on here about it.

[mccuistion]

Count me in, just tell me the damage and who to send my portion to.

The borescope that Mark did confirmed that the Liberty barrels do have a compound throat... a rough one but it's there.

If you're getting a JGS reamer dulled from the neck back won't that allow for quite a bit of slop in the indexing? Seems like dull blades might not center the cutting portion in the throat as well? I'm not claiming this, just asking, as I have no idea.

[JASmith]

C...The borescope that Mark did confirmed that the Liberty barrels do have a compound throat...

The sensitivity of this topic means that we have to be very careful with our statements, lest we spark another series of pointless and painful posts.

Can you expand on this statement? How many barrels were examined? What were the results?

Remember that at least one chamber cast indicated that there was no compound throat.

[WildBill3/75]

Count me in, just tell me the damage and who to send my portion to.

The borescope that Mark did confirmed that the Liberty barrels do have a compound throat... a rough one but it's there.

If you're getting a JGS reamer dulled from the neck back won't that allow for quite a bit of slop in the indexing? Seems like dull blades might not center the cutting portion in the throat as well? I'm not claiming this, just asking, as I have no idea.

The reamer I am having made is being made to the exact dimensions of the 6.5 Grendel SAAMI chamber. My understanding having talked to several reamer makers is that they believe there should be 0 issues using this style of reamer to extend the throat without changing headspace and maintaining the compound throat....even done at home with a t-handle and high sulfer cutting oil since the chamber already exists. So no I don't believe there should be any indexing issues with the reamer having a body to shoulder that doesn't cut. This reamer is made by JGS, who is one of the top quality reamer makers and I trust they will make it to the high standard they are well know for.

Right now the projected date to receive the reamer is in early June.

I'm thinking that right now just taking a headcount of all those that want in is best so I can decide the best course of action as for how to split the charges goes. I will also be the guinea pig to test the reamer before sending it to others to use.

Send me a PM titled something about the reamer so I can easily track who wants in on using it.
Thanks

[Lead Chucker]

Hey everyone needs a good reaming from time to time!!

[45r]

When I talked to someone at Dave Mansons shop I asked if dulling the reamer would work and he said a regular reamer would be better if done carefully.
I would think you could blue the shoulder area of the chamber and go slow with light pressure turning the reamer till you feel it start into the shoulder or see any blue getting scraped off the shoulder.
The barrels are soft steel and it should cut easily.
If somebody doesn't want to try it themselves it might be better to find someone who has the feel for doing it by hand.
It shouldn't cost much since it would only take a few minutes for somebody with the skill.
When I bought my manson reamer I resold it for more than half what I paid after I got done with it.

[Tedward]

The sensitivity of this topic means that we have to be very careful with our statements, lest we spark another series of pointless and painful posts.

Can you expand on this statement? How many barrels were examined? What were the results?

Remember that at least one chamber cast indicated that there was no compound throat.

Are you referring to the castings of a Precision Firearms and Liberty chambers that had the Liberty Casting that was full of air bubbles? The Liberty Casting was just poor and looked like clay in a 3rd grade class project? I have no idea how you could see the results of "No Compound Throat". I could clearly see the lands were closer to the chamber resulting in less o-give but that is about the only visual difference.

[NugginFutz]

ETA: just noticed Ted has been banned. Not fair to pose a question to the recently departed...

[babaganoush]

Some people never learn to shut up. Others just never learn. Period.