Casting for Machine Guns

[nrasports]

I recently casted some Lyman TC 125 grain lead bullets for 9mm. They run fine in my pistols shoot straight and seem to perform well. I then decided to try some in my UZI Group Industries SubMachine Gun. They fed fine in gun, being an open bolt Machine gun I thought I would get some hang-ups but I didn't have a single one. I was little surprised. HOWEVER, when I brought my target back, every single round had keyholed on the paper target. I saw perfect sideways bullets on the paper. I was curious does anybody on the forum shoot cast through they sub-guns, if so have you ever run into this problem?

I tumbled lubed these particular bullets with Liquid Alox even though they are not tumble lube bullets and I sized them in a Lee sizer, then I relubed them.

[dondiego]

Probably don't want to size them.

[mpmarty]

Some sub guns have large chambers and oversize bores. slug that mini and adjust size to fit.

[nrasports]

Some sub guns have large chambers and oversize bores. slug that mini and adjust size to fit.

Marty, What does "Slug that Mini" mean?

[338RemUltraMag]

Slug the bore, you may be suprised to see it is .358 and may need a .359-.360 bullet

[Smoke4320]

"I tumbled lubed these particular bullets with Liquid Alox even though they are not tumble lube bullets and I sized them in a Lee sizer, then I relubed them. "

you tumble lubed them and they tumbled so what did you expect ? just kidding :) :)

I am shooting a FA Uzi using 38 cal 158 grn boolits.. PC'ed sized to 358 and its working well ..
as they say slug the bore and go up 1 to 2 thousands .. so far .002 up seems the best for me

[smkummer]

In my open bolt subguns such as an Uzi, I am using Lee's 125 TL NR bullet sized to .357. The come out at about .359. If your bullets are dropping at .357 or less, then I would not size. I am also dropping them in water but since I am sizing about .002, I may be loosing surface hardness. My bullets are flying straight but I still get leading. If I brush out the barrel every 2-3 magazines, I can keep the leading down enough for somewhat normal cleaning. I am also shooting a plus P load for open bolt guns and they appear to eject and function better.

[nrasports]

Cool thanks guys for the info!

I've got 10,000 115 grain Berries bullets coming any day and I think I'm going to dedicate those to my full Auto shooting. I'll just cast for the pistols for right now since it seems to working the best.

[Dan Cash]

Friend of mine has used Laser Cast .452 TC bullets in his 1928 Thompson with excellent results.

[felix]

Water dropped boolits will not get softer except where the lead actually moved. Boolits shot with shallow lands still might be questioned, water dropped or not. ... felix

[cs86]

Just curious but did you get terrible leading in the Uzi?

[Harter66]

I had a 40 S&W . I thought what the heck air cooled WW ought to do. Every load tumbled from start to max. the next batch I water dropped . It's the only 1 I've ever shot that took a max load for best load.

In that case harder was the answer to the tumble. 403 in a 401 groove even the tumblers didn't lead.

[historicfirearms]

My semi auto Uzi groove diameter is .358. I can get a .360 boolit to chamber reliably. If you are sizing to .356, and tumble loobing with LLA, try going bigger and using a good lube.

[root]

I have a MK760 9mm and a powder springs MAC/10 45 acp and never had a problem.
I use straight WW water quenched.
Tumble lube and use a 450 lyman that I converted over to a push through.

This ammo also works in a friends transferable mini uzi and 1928 west hurley.

All but the west hurley have cans hanging on them, never a problem, nice round holes.

Like everyone else said slug the barrel.
Something isn't right.

[nrasports]

Just curious but did you get terrible leading in the Uzi?

No it wasn't bad at all, I use a OIL/Lubricant, which is also a metal conditionor called FIRECLEAN www.cleanergun.com is the place that invented it, not only does it make your Semi-Autos run slicker than snail snot, but it has a higher smoke point than Froglube, and I found that it reduces lead fouling very well. I use it now for everything.

I was having some leading issues in my G21 with a KKM barrel, then I used it as a borecleaner and it not only removed all leading deposits with nothing more than a factory GLOCK rod and plastic brush, the next time I shot it the gun had almost no leading.

Some PICS.....

Just to Give you an Idea, This is a G21 Barrel with 400 rounds of range scrap lead, 3-5 minutes of cleaning with FIRECLEAN...

USED a GLOCK plastic brush , one piece of toilet paper.

http://i16.photobucket.com/albums/b18/rob99vmi04/fireclean_zpsf0a23efc.jpg (http://s16.photobucket.com/user/rob99vmi04/media/fireclean_zpsf0a23efc.jpg.html)

http://i16.photobucket.com/albums/b18/rob99vmi04/barrelwithfireclean_zps753b95ed.jpg (http://s16.photobucket.com/user/rob99vmi04/media/barrelwithfireclean_zps753b95ed.jpg.html)

Just so you can compare here is my TLR-1 light after shooting, almost completely smoked out!

http://i16.photobucket.com/albums/b18/rob99vmi04/Lightwithlead_zps35d56a15.jpg (http://s16.photobucket.com/user/rob99vmi04/media/Lightwithlead_zps35d56a15.jpg.html)