P-10F at 100 yards today, almost back to normal

[Joe L]

I spent a lot of time and effort trying to get all the carbon out of my P-10F barrel last weekend.  I got maybe 1/2 of it out, but I at least knocked down the high spots enough so that it shot just fine this morning.  Here is a short video of two sub 5" groups at 100 yards using IMI 115 gr JHP box ammo. 

https://youtu.be/hiPeG-oh80I

I am going to work it even harder this coming weekend after I receive some intensive abrasive pellets, as the brush/JB/Kroil isn't enough.  At least now the gun is grouping normally again.  The limitation today was my nerves and eyesight.  I just wasn't very steady.  And the Holosun "1 moa clicks" aren't 1 moa and they aren't repeatable.  The Burris adjustments are more precise but the dot isn't as crisp.  The Holosun will be fine once I quit messing with the zero, which may have been today.  I think it is close enough now. 

Joe

[SoCal]

Well done, I have trouble at 25 YDS.

[Joe L]

An update from last week's efforts....

I cleaned and cleaned and cleaned the p-10F barrel and got nearly all the carbon out.  Next I drove to New Mexico hoping to shoot the gun at 200 yards along side my P-09.  Well, I tried it at 100 yards first with poor results and waay too much vertical stringing.  Removing all the carbon was a bad idea with this rough barrel.  It needs some buildup before it will shoot well again.  If I had stopped with it the way it was in the video above, I would probably have been OK for a few hundred or maybe a thousand rounds.  The problem is that I am not sure how much buildup is enough so the accuracy is there versus too much and the accuracy falls off again.  The smooth P-09 barrel shoots fine every time I take it out, probably because the carbon and copper buildup is very smooth and uniform, unlike the rough barrels. 

I am going to replace the CZ factory P-10F and S (when available)  barrels with Primary Machine match barrels.  That will be less expensive and much less frustrating than figuring out how much buildup is optimum for the rough barrels.  I'm thinking it may take 500 rounds or so to get the factory barrels to shoot well again.  I can't tolerate that, I'm afraid.  P-10F barrel on the way.

Joe

[Joe L]

So I also ran the borescope down my early production P-10C barrel and it looks a lot like my P-09 barrel--some copper and smooth carbon fouling but the grooves don't look like they are galled or chattered.  So maybe all the Czech barrels are machined a little smoother than the US made barrels? 

Again, let me make it clear that the rough grooves in the P-10F and S barrels are not a problem for anyone that isn't shooting 100 and 200 yards and has come to expect match grade custom hand gun repeatability and performance out of an inexpensive service pistol using military grade box ammo.   

[M1A4ME]

Joe, would you expect the rough P10 barrels to have increased pitting, in the future, due to the propensity for trapping more carbon in the rough spots?

Just curious about the pitting under the carbon you had with some of your barrels in the early days and how that might be more of an issue in a barrel that is more difficult to get the carbon out of due to interior surface condition when new.

Not trying to say it will ruin the barrel.  Just curious about your thoughts.

[Joe L]

Joe, would you expect the rough P10 barrels to have increased pitting, in the future, due to the propensity for trapping more carbon in the rough spots?

Just curious about the pitting under the carbon you had with some of your barrels in the early days and how that might be more of an issue in a barrel that is more difficult to get the carbon out of due to interior surface condition when new.

Not trying to say it will ruin the barrel.  Just curious about your thoughts.

Yes.  But the pitting is simply irrelevant compared to the galling/chatter roughness anyway.  I am going to make a video of the P-09 and P-10C barrels later today showing the condition they were in when shooting perfectly well.  The P-09 barrel accuracy simply doesn't change with a little carbon/copper build up, whereas the rough barrels don't shoot perfectly until there is some buildup. 

[armoredman]

I don't have a bore scope, might be interesting to look down the bore of the Competition Ready, as it SHOULD be a much better barrel. It certainly is making ME look better!