Lead then Copper Jacket...Dangerous?

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Dec 10, 2006
My first handgun manual, Beretta, stated that one should never fire a copper jacketed bullet out of a barrel that lead bullets have been fired without cleaning it first.
This is because the lead could foul the barrel causing an obstruction for the harder jacketed bullet that may cause a catastrophic failure.
I have always followed this "rule" with all of my handguns just to be safe.

Do you agree with this?
If you do agree, is the same true for SJHP's where in my opinion the lead tip of the bullet does not contact the barrel?
After shooting lead, I have also been removing "some" lead by shooting copper jacketed bullets before leaving the range. I then clean as usual when I get home.
Properly lubricated lead bullets won't deposit enough lead to worry about unless driven at very high (rifle) velocities, then you want to use gas checks.

Beretta's lawyers want to make sure they cover every possible problem so if your gun does let go, they have made sure the manual says don't do whatever you did and they don't have to send you a new gun or pay your medical bills.

I've done it for many years without incident. The worst case of leading I've had was my Mark IV after about 500 rounds of LSWC through it. I fired a magazine of JSWC last and then went home. Cleaning was no worse than any of my guns.
I've done it, even to the point where I take tcp bullets and seat them backwards to have a sharp corner to dig the lead out of the rifling. Oh, and thats with the .45-70's shooting big ol' 520 grainers. One or two plated bullets at the end of the session works great. Never noticed any pressure signs, either.
Just yesterday I cleaned my 357 Colts and noted the leading in the barrels. These are less than 3 years old with about 1200 rounds through each and I was very surprised at the amount of lead I removed with the Lewis Lead Remover and some Hoppes.

These pistols were new and have only been shot with hard cast 130 grain .357 bullets with a moly lube at moderate CAS velocities (about 800 ft/s).

The suggestions to prevent leading seems to go counter to what I have read previously; e.g. that copper deposits accelerate the leading problem!

Anybody have any other specific references for this? I found this one:

Thanks, streakr
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