Ream a chamber for 9maj

[newageroman]

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.

Thanks Boss! That info is spot on. I didn't even think about the mag length issue - duh!
I just got through fitting my first CZ barrel and boy was that FUN!

I'm going to just go ahead and get bother barrels reamed - 75B and threaded SP-01 - the stock 01 barrel is for sale if anyone is looking. I will send a dummy round off with the barrels.

Good info on the load, and thanks for sharing. I've not loaded 9M before, so will be a slow process.

Next part will be a good 2 or 3 port binary comp - I have some comp links saved that I'm previewing and will post later.

[George16]

Just to update, I found a guy over at the Enos forum who reams barrels so I sent all 3 of my czechmate barrels to him . I also sent him a dummy round set at 1.169” OAL using a PD 124 Gr JHP. The barrels are on their way back to me now and should be here by Thursday.

By the way, the Czechmate and TSO barrels are not hardened. One way to test it is by sliding a file across the barrel. If the file just slide over the surface without snagging or “biting” into the metal, then it’s hardened. It’s an old trick by blacksmiths when they quench blades they’re making.

[sevt_chevelle]

What is the contact and care to share what he is charging to ream your barrels?

[George16]

What is the contact and care to share what he is charging to ream your barrels?

His Brian Enos forum name is MemphisMechanic. Let him know that george16 recommended you. He charges $38 per barrel (as long as it’s not hardened) and that includes return shipping to unless you want additional insurance. I gave him extra money for extra insurance for the return shipping.

For hardened barrels, there’s an extra charge that you can negotiate with him.

[Boogalou]

What is the contact and care to share what he is charging to ream your barrels?

His Brian Enos forum name is MemphisMechanic. Let him know that george16 recommended you. He charges $38 per barrel (as long as it’s not hardened) and that includes return shipping to unless you want additional insurance. I gave him extra money for extra insurance for the return shipping.

For hardened barrels, there’s an extra charge that you can negotiate with him.

I just had my P10C barrel done by him.  He charged me $45

[George16]

What is the contact and care to share what he is charging to ream your barrels?

His Brian Enos forum name is MemphisMechanic. Let him know that george16 recommended you. He charges $38 per barrel (as long as it’s not hardened) and that includes return shipping to unless you want additional insurance. I gave him extra money for extra insurance for the return shipping.

For hardened barrels, there’s an extra charge that you can negotiate with him.

I just had my P10C barrel done by him.  He charged me $45

Yup, It’s more expensive for hardened barrels from a P10C and shadow 2 or glocks.

[newageroman]

Yes, that is the same guy I was in contact with, and about the same price. I think I'm holding off on getting mine reamed until I have a comp and read to load for 9maj.
I just spent my gun $$$ on the last Bottle of Power Pistol in town along with primers and ordered a case of PD124s - I figure that's better money right now.

Thanks again for all the info!

[George16]

Received all three barrels earlier. The reaming job was done exceptionally well and Initial testing of dummy rounds sized to 1.170” are good to go but I’ll be mainly loading at 1.160-1.165” OAL with CFE pistol and AA7.

I’ll be going to the range tomorrow to chrono my CFE pistol and AA7 loads using both 115 and 124 Gr PD JHP.

[gifbohane]

George-

 Any reason that you load it to almost SAAMI max?  I rarely load a 9mm to 1.140 and my CZ to about 1.120.

[George16]

George-

 Any reason that you load it to almost SAAMI max?  I rarely load a 9mm to 1.140 and my CZ to about 1.120.

I’m shooting open major (min 165 PF) in USPSA. I want to load as long as possible to allow more powder in the case to produce more gas to allow the compensator to do its job. My previous max OAL was 1.145 and I can’t load as much powder as I want to produce more gas to work the compensator without risking over pressure.

[Wobbly]

I want to load as long as possible to allow more powder in the case to produce more gas to allow the compensator to do its job. My previous max OAL was 1.145 and I can’t load as much powder as I want to produce more gas to work the compensator without risking over pressure.

I understand the part about the gas and compensator, what I don't understand is why you draw a rigid correlation between more powder volume and more gas volume. This thinking doesn't seem to take into account the powder density.

The gas also builds chamber pressure which is documented in every load manual. This statement seems to be saying that a powder with a high density can't make as much chamber pressure.

Please explain.

[Bossgobbler]

Open loads use slow-burning powders.  With the slow-burning powders used for 9mm major, you need +/- 9gn of powder. Most of these loads fill the case all but 0.050",Vv N350, 3N37, 3N38. Major pistol is a little denser and loading out to 1.155" - 1.160" is still a compressed load.

[George16]

Bossgobbler explained it well. Shooting open major requires slow burning powders like the powders he mentioned. I have tried 3N38 and it literally overfills a 9mm case and it makes a mess on my Dillon. Availability also sucks so I stopped using it.

I just did a ladder test of 9.02, 9.12, 9.23 and 9.35 Gr of AA7 with a 115 PD JHP earlier today along with 6.54, 6.72, 6.84 and 6.97 of CFE pistol with 124 Gr PD JHP. OAL were 1.163-1.165”.

There’s more gas produced by the AA7 and even though the recoil impulse is harsher compared to the CFE pistol load, the gun shot flatter.

[newageroman]

Been a while, but back on this project. Got the 3600 124PDs in last week. Tested a few rounds using Power Pistol. I only made 5 bullets of each charge to test for functionality.

6.2 - felt OK
6.4 - felt like my minor PF loads and is estimated about the same level
6.6 - better
6.8 - even better
Then I 2 bullet of Speer Factory Gold dots- holy crap, noticeable difference! I think I still have a ways to go.

So the plan from here is make a bunch of Minor load bullets for plinking and a small stack of the 6.8s.

I'm still on the fence about having my barrel reamed. Max COAL for this gun is 1.130" (where is starts to plunk). I'm running COAL at 1.115" for any other variances.

I will say that shooting the SP-01 in tuned form is simply awesome! I ran the old 75B too, but the 01 is pure silk. I've stopped taking targets to the range. I just throw some clays on the bank at 50 yds. A couple of sandbags on the bench and watch them pop away.

I had to keep myself from laughing at the dummies that showed up with a bunch of ARs and AKs and couldn't even hit a freaking 2 liter bottle on the ground at 20 yards on mag dumps.

So next I need to figure out a good way to mount comp. Stay tuned and thanks for the advise.

[Wobbly]

I had to keep myself from laughing at the dummies that showed up with a bunch of ARs and AKs and couldn't even hit a freaking 2 liter bottle on the ground at 20 yards....

Too many Hickock45 videos !!