Anybody have any luck shooting cast bullets in thier autoloaders?

What kind of autoloaders are you referring to? Blowback or recoil operated there should be no trouble (so long as the rifling is compatible ala Glock and HK polygonal bores). For gas operated, I was wondering the same thing about a .458 SOCOM I built up on an AR-15 frame. The advise I got from the builder and others much more familiar with the intricacies of the AR-15 than myself advised not shooting lead in gas operated semis unless I was willing to be VERY diligent in keeping the gas block and gas tube cleaned out. It seemed like more trouble than it was worth. In semi handguns like the 1911...then lead poses no problem at all. I have shot a ton of them out of my .45 ACPs over the years and accuracy is, or can be, top notch.

Militery rifles!

Again, what kind of military autoloaders? AK-47, SKS, M14 (M1A), M16 (AR-15), M1 Garand, HK G36 and SL8, any gas operated autoloader it would be advisable to stay with jacketed bullets unless you are willing to go the extra miles in keeping the gas port and gas system free from lead fouling. For military autos like the HK 91, 93, 94, MP5, PSG1, 21, 51.... that are based on the roller lock design then lead would not be a problem with the system. However, I am not sure about the use of lead bullets in some of them that have the polygonal bore like the later 91, 911, SR9. Being the lazy type, if it is gas operated I would stay away from lead bullets, gas checked or not.

Have to agree...I've not had any luck getting functining and non-fouling in a gas operated semi-auto. That gas vent is pretty much a facotry installed 'pit', and it will collect bits of lead and lube that flows into the gas system. have watched other people run 30-40 rounds of lead loads in their rifles without problems, I've never geen able to do it (and those that did were using some pretty loosely fitted Garands). There are more fun things to do that spend the time scraping off a lead-plated gas system.

Got one .30carbine to behave with a load that barely functioned using a 115gr. GC lead bullet. Would still gunk up eventually and require a detail clean of the gas system....about 5 times sooner than nasty surplus ball ammo.

Have gotten them to work in HK type roller-locks...no gas system. The poly-bore did require periodic cleaning. Use light loads (light enough to non-function...a manual operated repeater rahter than a semi-auto) in a Mini-14 but still end up cleaning the gas system of a gunky mixture of lube and lead specks (no real leading in the bore...but believe a bit extrudes.blows off as it passes the gas port). the CETME's used a standard rifling pattern and nay be a possible cast bullet shooter.

Recoil operated (non-military types...Winchester ,351 and .401) work fine. Again, no gas port and not terribly fast rounds.

How about a SKS

bigmark300-
SKS will work fine with cast, as will ALL the other types. George Nonte wrote an article about this years ago. I beleive you can still get this from Wolfe publishing.
Try the RCBC 308-165-sil bullet with 4198 in the 7.62x39. Cast the bullets out of wheelweights and drop into 5 gallon bucket of water out of the mold, lube with LBT blue and you should get no leading and little fouling.