CZ SP-01

[bradthegunmaniac]

I've had my CZ for about 4 years never had any leading problems until recently. I have been shooting moly bullets with solo 1000 the whole time. Any idea why I might be having problems now?

[pbosik]

What problems are you having? I see you say leading, but more info would help.

Edited May 18, 2014 by pbosik

[Prov1x]

Leading problems? Did you switch bullet manufacturers of different grain?

Edited May 18, 2014 by Prov1x

[bradthegunmaniac]

No change in my recipe. The barrel was always clean now there is lead in the rifling after 100 rounds.

[fishsticks]

New batch of bullets from same mfg? Is it possible the bullets are slightly undersized? That can be a contributor to leading.

[basman]

Check your crimp.

Pull a bullet and see if you are cutting into the coating.

[rtp]

Check your crimp.

Pull a bullet and see if you are cutting into the coating.

^, or possibly an aggressively set Lee Factory Crimp Die (if used), could be swaging the bullet down a bit, which can certainly cause leading.

[MRevolutionIX]

I was having that issue when using the Lee FCD and because it was essentially resizing the bullet, I was having tumbling issues.

[bradthegunmaniac]

Dillon dies I haven't changed my press

[MRevolutionIX]

When was the last time you cleaned your dies? Those moly bullets can leave a lot of residue and maybe enough to change the inside diameter of the sizing, seating and crimp dies if they havent been cleaned. Just a thought...

[Bunsen]

Also may want to check the hardness on the new batch of bullets and make sure it is good. that could also lead to the problems.

[BeerBaron]

if the thing has been shot a lot it 'could' be a worn barrel. don't jump on me guys! I mean if shooting 500 rounds a week as many competitive shooters do it's not unreasonable to expect to have to spend another $130 on a barrel after 4 years of use... is it?