Ream a chamber for 9maj

[newageroman]

I'm about to buy a new threaded barrel and comp as seen in this thread - also ammo related:
https://czfirearms.us/index.php?topic=107896.0

How much do you ream the chamber for a 9maj round - using 124 PD and HS-6 or similar. I know it's particular to the setup, but how do you arrive at it/would suggest arriving at it? Would I be better off buying the reamer and doing it myself little by little?

[George16]

Most of the guys I shoot with that had their barrels reamed had it done to 1.180”. They usually load VV 3N38, HS6, WAC or CFE pistol so they usually load between 1.160-1.170” OAL.

I wanted my czechmate reamed too but Patriot defense doesn’t do it anymore when I last contacted them last year. The czechmate and shadow 2 barrels are hardened according to them.

[Wobbly]

The Czechmate and Shadow 2 barrels are hardened according to them.

It is my understanding as well, that a lot of CZ barrels are hardened. Hardened barrels will require a professional; it's not something a Brownels reamer can do at home. And maybe Patriot Defense doesn't do it any more exactly because it wears out reamers.

[Stuart]

the barrels eat reamers like crazy!!!

[Togmaster]

What if anything do you guys do get magazines to feed reliably for such a long OAL?

[George16]

The Czechmate and Shadow 2 barrels are hardened according to them.

It is my understanding as well, that a lot of CZ barrels are hardened. Hardened barrels will require a professional; it's not something a Brownels reamer can do at home. And maybe Patriot Defense doesn't do it any more exactly because it wears out reamers.

That’s exactly the reason I was given.

[newageroman]

CGW threaded barrels out of stock.
Just ordered from czusa - threaded barrel and few other small parts. Plan is to fit barrel and start working with minor loads using HS-6. Reaming chamber, Comp and SAO conversion to come. Thx

[George16]

the barrels eat reamers like crazy!!!

Do you still ream them though? Thanks.

[Wobbly]

Why not simply order the barrel reamed to your specs ? There are barrel vendors on this website that can do stuff like that.

The owner of Primary Machine is on here all the time under the name Raining_Brass .

https://primarymachine.com/

 

[FALer]

There's a guy on the Brian Enos forum who has the carbide reamer for doing CZ barrels. He's done my threaded P09 and P07 barrels.
Guy is a competitive shooter and charges just enough to replace the reamer when it dulls.

[newageroman]

There's a guy on the Brian Enos forum who has the carbide reamer for doing CZ barrels. He's done my threaed P09 and P07 barrels.

Excellent! - just what I'm looking for. I lurk on that forum some.
Please PM me the contact name.

Other options are to have it done somewhere locally. There is a guy that is a CZ smith and does USPSA, will have to check with him, season is here...
In the meantime... project continues. Barrel should be here this week, Grips and mag well are on the way. Next payecheck will fund the 124PDs (just run them minor for now).
Leaning toward swapping all the parts from my old 75B SAO conv. into the SP-01 - funding reasons mostly, but I do think it would be fun to dive into the guts once again (it's been a while).

[rckendall]

I really enjoy projects and I thank you for letting us follow along from the comfort of our easy chairs! I will certainly help if I can but you are probably way beyond my abilities.

Good Luck,
Richard

[newageroman]

OK, this project is back on. I have threaded barrel, soon to be fitted, then sent off to be reamed. The reamer has a great 2 barrel deal, only marginal to ream a second barrel and such. But I have a question for you guys.
Would there be any disadvantage over having the barrel for my old 75B reamed for 9maj, but still shooting 9minor (in limited, and plinking)? Most likely will be using the same 124PDs. Would the extra bit of "jump" when using factory/minor/standard COAL loads have any noticable affect? Ammo nerds want to know... I do.. know about bullet jump in rifles and such, those effects are basically nil here.

The czechmate and shadow 2 barrels are hardened according to them.

Also, re-reading this post makes has me hoping the ability to easily (or more easily) ream the chamber of a stock 01 will be an advantage of using the it as a build platform.

[painter]

It's my opinion that bullet jump in a pistol is inconsequential.

That said, I'd only lengthen the chamber enough to be able to load the bullet of your choice at SAAMI max of 1.169.

[Bossgobbler]

When you send your barrel off to be reamed send a dummy round with it. Your dummy round should have the OAL that you are going to use. The CZ mags are small and will not let you use an OAL much past 1.160" with jamming. The OAL I use for my Czechmate is 1.145"-1.155".  HS6 powder burns dirty. Auto-Comp/CFE pistol will be the easest powder to use but is on the fast side for major power factor loads. Other powders will work the comp better. VV 3N37, N350, 3N38, and Major Pistol powder are much better for Major power factor. The VV powders will fill the case so you have to load slower. Major Pistol powder is about the best powder for Major power factor loads and will let you use 115 or 124 bullets without filling the case to the top.