Lead reloads w/ glocks

Question
Hello,
I just finished reading the response you gave to Charles, regarding Glocks and reloading, but I have just one question. Suppose that I clean the stock barrel with the wire brush after every shoot, will that be sufficient to prevent lead build up?
Also, I just picked up a sig226 in .40sw, can I shoot reloaded lead bullets without issue? I appreciate your time.
Cheers,
Etienne

Answer
Theoretically, perhaps, although a wire brush will not get all the lead out - you'll need a solvent or an abrasive designed for lead - it literally welds itself to the barrel. The Glock manual itself says that if you use lead projectiles, you thereby void your warranty.

Mark Passamaneck is an Engineer who works in forensics. Part of his work is to determine when and why firearms and other machinery fails.

He has pointed out in publication that SAAMI max pressure for the .40 S&W is 33Kpsi.

After 50 rounds of lead through a Glock barrel pressure was at 34.2; @100 = 35.1; @150 = 38.8; @ 200 = 41; @ 300 = 45.

Even after 100 rounds of lead you will begin to get micro-fractures from the increased pressure.  The barrel will not have a catastrophic failure the first or second time you shoot 100 lead projectiles through it, but you will be on borrowed time for it to eventually happen.

SIG was the innovator of polygonal rifling and so, No, I would not load lead projectiles for a SIG.

And why would you? With plated (as opposed to jacketed) bullets being nearly the same cost as lead, why would you want to bother with the mess of lead lube, even if it was safe to do so?