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“If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun.”
― The Dalai Lama, Seattle Times, May 2001
See post #7
http://castboolits.gunloads.com/show...=1#post4083651
That is what the throat should look like...and almost all new semi-auto's DON'T look like that, at least not the new one's I've bought in the last 5 years
~~~~~~~~~~~~~~
“If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun.”
― The Dalai Lama, Seattle Times, May 2001
Hello fellow Saffer. Yes S121 is very fast. Try S221. Most of the production and production optics are using S221.
Edit: not most, quite a few.
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Last edited by mozee; 02-28-2020 at 02:55 PM.
FYI S121 is close to VV N310 and S221 is close to VV 3N37
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People have different experiences, I use the carbide crimp die on all my 9mm ammo , but I load .356 or .357 bullets and they are all hi-tek coated.
I have 8 ,9mms one of my shooting buddy's has 3 and he also uses the Lee 4 die sets we get very little to no leading most of our loads are 950 to 1050 FPS 124 and 135 gr. If you need oversized bullets it's the wrong choice if .355 to .356 work at moderate velocity they simplify the process. I have a few cartridges I don't use them on but I do on 9, 40 , 45 auto.
I might have forgot to mention.
We are using these CZs for a while now with the same load / heads. Same coating as well
Only recently the leading had become crazy. Previously once in a while you will find a little.
This is why I went to new lead coating and even commercially hitek made boolits
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How many rounds are fired between cleanings ?
Max 500
We getting leading now after like 30rounds
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Have you changed brass source lately? Certain brands are thicker than others and more likely to swage down the boolit when seating.
I had my CZ75 throated, switched to a 38 S & W expander and used slightly harder lead and still had some leading until I switched to a slower powder (Unique in place of 231). Now all is well.
God Bless, Whisler
Brass is the same I mainly use S&B brass.
So this is the steps I intend taking now.
Change out crimp die to Dillon and probably find someone to throat the barrel.
I can't think of anything else.
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Unfortunately, the Shadow 2 is stuck with whatever throat it ships with. These barrels are case hardened, and the case hardening is VERY hard. Considerably harder than a salt bath hardened barrel. Chucking one of these barrels in the lathe for crowning with carbide tooling produced an extremely loud and piercing scream, which the carbide cutter merely shined the end of the barrel then with enough pressure against it, it suddenly broke into and through the case hard layer, and was soft underneath.
Since cutting freebore in a barrel involves mostly a shave of sorts, it is impossible to cut into the thickness of the case hardened layer with a carbide reamer, and if the reamer did break through into the underlay, the freebore would be quite a bit oversized.
If I had a small toolpost grinder for the lathe, I could conceivably grind freebore into the throat but this would be the only way. DW barrels are the same way, I did use a Cratex high torque air driven grinder mounted in a boring bar holder on my toolpost to put a forcing cone into one of the DW barrels and it worked well, but this was out where I could see the work and control the angle, it would be much more difficult to try and throat a CZ barrel, near impossible to center the chamber in a 3 jaw chuck unless I got lucky and it was concentric with the outside of the barrel.
My parkinsonism that controls walking and balance has made me unable to work in the shop. VOTE RED * PRAY OFTEN You are welcome to message me here or send email to xlordsguitars@gmail.com.
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