CZ P-09 Ransom rest results

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Post by Wmvdg123 on 3/14/2019, 10:43 pm

I have been a member for a year or two and everyone has been very helpful with questions.

The CZ P-09 is polymer gun that is quite accurate. I have been working up loads and feel I have found a few things that improve accuracy in my gun. Getting a ransom rest really helped pin down what is effective, but it is technique sensitive.

Here is a video of my load with 115gr hornady xtp's, 6.0gr of power pistol, COAL 1.125, federal gold match primers. The two 10 shoot groups measured 1.18 inches and 1.35 inches at 50 yards.




Here are some things that helped with my gun.
-Maximizing accuracy with the ransom rest. I started using the ransom rest like the AccuracyX videos (which are amazing by the way!). I stumbled upon an alternative technique. I attached a string to the ransom rest and pull this back with my left hand and quickly return the ransom rest with my right hand. This allows it to be very consistent. You can see this on the videos I posted below from my powder work up on some 115gr HAPs.
-Used starline brass cleaned with wet tumbling (I use the Franklin platinum tumbler) and lengthened with the EGW U-die, the average length even with multiple firings is 0.750 inches. 
-Expanded to just allow the bullet to slip in using the Custom Powder Funnel from Uniquetek.com (this is made by forum member photoescape I believe)
-No crimp
-There aren't any oversized match barrels like for 1911's, so I added some epoxy to the side of the barrel, opposite of the extractor. This helps tighten up the slide to barrel fit, and on the CZ the slide to frame fit is quite good.

Here are some videos of a powder work up with power pistol.
6.2gr power pistol
https://www.youtube.com/watch?v=mCzm11Iphx0&t=52s
6.0gr power pistol 
https://www.youtube.com/watch?v=ZsIQIIqlrz0
5.8gr power pistol
https://www.youtube.com/watch?v=ijyCM8Qndgs

I know many forum members recommend the 5.25 XDM. This could also be very accurate with the barrel welded up or epoxied. 
Wayne


Last edited by Wmvdg123 on 3/15/2019, 7:23 am; edited 1 time in total

Wmvdg123

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Post by Orpanaut on 3/15/2019, 1:04 am

That's an unusually long overall length to use with the XTP bullet. Did you settle on that after experimenting with shorter COALs?

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Post by Wmvdg123 on 3/15/2019, 7:17 am

Yes I know it seems long, I think I measured the COAL of Atlanta arms 115 gr xtp at 1.075. Cz pistols have pretty tight Chambers and 1.125 is just barely touching the lands. I have tested from 1.040 to 1.135 and 1.125 shoots the best in my gun.

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Post by Orpanaut on 3/15/2019, 6:53 pm

How does the performance of your handload compare with the Atlanta Arms XTP load?

Also, what sort of sights are you using? I would like to use my CZ P-09 for CMP matches but I haven't found any suitable sights that will fit in the stock dovetails.

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Post by Wmvdg123 on 3/15/2019, 8:02 pm

I bought a box of Atlanta arms about a year-and-a-half ago before I got my Ransom rest. I pulled apart some of the rounds from Atlanta arms and powder did appear to be a ball powder, which is a proprietary powder. I asked on this forum I believe if anyone knew what powder they are using and at that time the closest estimated was n340, which of course is a stick powder. This powder seems to have less recoil than power pistol, but I would think that power pistol is more accurate. I sandbag them at that time and they appear to be similar to my loads with n340 in accuracy. My handloads are better now.

Yes, one of the problems with the P-09 is there's no aftermarket support. There are no adjustable rear sights and so it is not ideal for CMP. I have two of these guns on one of them I put an RMR, I had primary machine mill the slide. However, I like irons more ironically. I wish there was an adjustable rear sight available. Perhaps with time.

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Post by Jon Eulette on 3/15/2019, 8:30 pm

Excellent results! Thanks for sharing.
You are allowed under CMP rules to machine the slide and mount a different rear sight. I built/accurized about 20 of these pistols in the early 90's....always liked them.
Jon
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Post by Wmvdg123 on 3/16/2019, 7:38 pm

Thank you Jon, any gun would be lucky to be accurized by you! That is a good point to that one can have a gunsmith mill the rear sight so could have a 1911 adjustable sight.

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