luketmv
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Posts posted by luketmv
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On 07/09/2017 at 7:11 PM, waktasz said:
Got the CDs and listen to them in the car from time to time
Where did you get the CD from?
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It seems to have been solved by reducing the crimp. no more tumbles, also changed batch of heads (still polymer coated) which could have also been the cause.
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2 hours ago, oddjob said:
OP,
What I did was measure the thickness of an empty case (just the wall). Multiply that times two. Measure the diameter of the bullets. Empty case measurements + bullet diameter = No crimp diameter. I got this idea from a thread here on the forum. At the very least you'll have a baseline for a crimp diameter. My crimp is just about none. It solved my tumbling problems.
It seemed to solve the problem but still not 100% convinced as there were 1 or 2 throughout the day and i may have mixed up some old rounds when filling mags, will be able to confirm next weekend, i increased powder and reduced crimp, which one solved it we will never know as if it keeps working i wont change anything
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On 9/9/2016 at 1:05 PM, noylj said:
Twist rate for stability with 147gn bullets is about 1:30. You are probably shooting a 1:10 to 1:16 barrel, so twist rate is NOT an issue--though one could argue that OVER stabilization could be.
What makes you believe that you have tumbling bullets? Below are pictures of REAL tumbling bullets. In many cases, what folks think is tumbling is simply NOT having sufficient target backing and getting oval holes. Were your targets backed by at least stiff cardboard?
So, if you really do have tumbling bullets, In almost all cases, undersized bullets are the problem. If shooting lead, you should be using bullets that are at least 0.002" over ACTUAL MEASURED groove diameter (normally, one would say at least 0.001" over, but for 9x19, I find that 0.002" works a LOT better). So, if you are shooting a barrel that has a groove diameter of 0.3555", you need bullets that are at least 0.3575" in diameter. I'll bet you are using 0.3555 to 0.356" lead bullets and they are simply too small for YOUR barrel. All of my 9x19s take 0.358" lead bullets without any problem.
In most cases, if you check GOOGLE, you'll find the biggest problem for 9x19 has been PLATED bullets that are groove diameter or less.
Another possibility would be damage to the barrel's muzzle that throws the bullet off as it exits and hot gasses shoot out of the damaged part of the muzzle, giving the bullet a "kick in the ass."
i know what tumbling is, i get keyhole shaped targets on proper IPSC targets. need to check on the diameter of the heads, did a bit of an experiment yesterday with a reduced crimp where i literally tossed aside the caliper and opened up the crimp die and just kept increasing until a bullet would chamber in the shadow 2 barrel.
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8 hours ago, biglou13 said:
what distance's are you seeing the tumbling?
Ive seen tumbling even at 10 Meters
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15 hours ago, IDescribe said:
There is a good chance your problem is velocity. Some 147gr bullet/powder/gun combinations will work fine as light as 131/132 PF, and some won't.
A couple of years ago while at the range with my ShadowLine, I noticed that a particular 147gr load would group better than a particular 135gr at 15 yards, but when I moved the targets out to 25 yards, the 135gr load grouped better than the 147gr load. Both loads were ~133PF. Shortly thereafter, I brought out different 147gr and 135gr loads to check, all again at 133PF, and they turned out the same. Why? It would seem that at 895-915 feet/sec, some of the 147gr bullets were starting to destabilize quickly, and it was showing up in group size by 25 yards. There was never any actual key-holing, but it showed up in groups. After that, after some playing around with 147gr loads, I discovered that with just a little more velocity, groups tightened up significantly at 25 yards. I learned that with an average velocity of about 905/PF133 where I had been operating, groups were going to be a little loose at 25 yards, and that with an average velocity somewhere between 910 and 925, groups were going to tighten up, and that it seemed to vary a little bit based on what bullet and powder I was using. My solution was to start loading all my 147gr bullets to an average velocity of 935 feet/sec, so a PF of about 137.
If you are having tumbling problems, increasing powder charge will often fix it. INCREASE your powder. You might find that just a .1gr increase will fix the issue. And you might find that a .2gr or .3gr increase will both fix the issue AND produce more accurate rounds overall.
ok will try that this weekend and let you all know how it goes
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27 minutes ago, Bullets said:
If you would like to stay with 147s i would try either switching to a different brand or type. Maybe try jacketed. Or try increasing powder. Are you shooting competition with this load?
Yes i am shooting competition with this load. PF is 130-132PF with the changes ive made. Jacketed are impossible to get here in Malta. Only find lead or these polymer coated.
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I understand this topic has been brought up before but ive already eliminated most of the comments people have suggested,
Loading 147 gr polymer heads with N320 3.3 gr which used to work flawlessly in an M&P Pro.
I now am getting about 1/5 rounds tumbling in the Shadow 2.
Crimp is not removing any polymer off the heads.
Tried reducing the powder.
can anyone help me with this as i am stuck.
Note: i would like to stick to 147 gr heads
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1 hour ago, 1sickPuppy said:
What country are you from?Malta
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On 8/27/2016 at 10:27 PM, Gridlock said:
I can't wait to get my hands on one any one. Any one know when they are coming out and how many
received mine last week. theyre slowly rolling out over the next few weeks im guessing.
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Can someone tell me if they know which block can be used with the shadow 2 in the one ghost holster as seen here.
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Fellas, yes I will be in Hungary for the Europeans. Just look for the fat annoying fanged guy (vs the standard fat annoying guy lol)
I'd guess (didn't have a gauge) that with the lightest spring installed from the kit you'd have a DA of about 7.5lbs, maybe 8. SA I have no idea.
What really impressed me about this gun vs Maria's is that I know this gun has zero tuning done to it. The owner was kind enough to let me use it and he had shot 200 rounds through it in practice and then the pre match of 360 rounds. Other than adjusting the trigger over travel it's straight out of the box.
Could you please give a good description how you arranged the over travel as im very new to CZ weapons.
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Can someone please confirm the magazine release is reversible?
yes, they are reversible, and you don't need to tweak the mag catch spring to stop the catch from over inserting if you press too hard, it's designed different and won't allow that.
Thanks!
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Can someone please confirm the magazine release is reversible?
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Does anyone have an update regarding pricing and availability yet? (Eu zone)
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Ok but regarding parts....
Ive heard of an improved CZ firing pin, is that legal?
The extended base pads whilst keeping 15 rounds, is that legal?
Can the trigger weight be pulled down to 5 lbs with some CZ parts?
Recoil spring can you use any spring made by CZ (11lb spring) ?
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Hi all,
New to the CZ area and am looking to purchase a variation of the shadow, if someone could explain to me the differences between the shadow, shadow line, and shadow orange that would be appreciated, also if someone could tell me what mods can be made to the gun whilst remaining in production division of ipsc. I read other posts but didnt really get a clear cut answer.
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Hi guys,
I am looking to purchase one of their competition belts and am trying to understand how it works, to start i have a ghost race holster and i was wondering how i would mount it to this belt? do i need the clips or do i just mount it directly? then the holsters etc how are those mounted, i know about the els clips im just not really sure i understand how they mount to the pouches.
also can anyone give me an idea about the model 014, is it better than the ghost holster?
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It's 3 lbs on the money with a 140mm STI mag. There are pics in this thread of both DVC'S on a scale.
Want to give us an inside on what Chris Costa is using in that picture?
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I was just going to post this, he even said it is a prototype, i wonder if it is the DVC or a tactical version of some sort seeing as it is in Costa's hands.
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Everything said is good advice. I also suggest that you try some factory ammo. If it will not run then call S&W. If you call them with problems with reloads they will tell you its your ammo. There might be an issue with your extractor, but, like everyone else said, you most likely need to tip the powder can a little more.
A chronograph is a very wise investment. It helps prevent pistol-bombs.
def not the issue any other ammo flies through the gun, its definitely the load just cant understand since im almost at the maximum of the vihtavuori guides. im already increasing the pressure.
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vihtavuori states a maximum of of 4.0gr
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What they all said. Get a chrono. Your powder charge is too light. I use 4.2 gr N320 with a 124 FMJ OAL 1.135. Get a chrono. and, get a chrono.
I was away and that is why the chrono wasnt an option, i will now try to chrono some slightly different loads however yesterday i had the chance to try out come rounds which i shortened to 28.4mm and they were working much better but still had a few stoppages, do you think at that length it is a safe load 4.0gr to test?
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Stove piping might mean too little powder ???
n320 vihtavuori say maximum load should be 4.0 gr.
My Shadow 2 modifications
in CZ
Posted
Any recoil buffer with that set up?