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#199645 - 05/14/19 11:48 PM Re: Powder Coating 101 [Re: jamesfromjersey]
sw282
addict


Registered: 09/01/12
Posts: 506
Loc: CSRA of GA/SC

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Been casting since the late 70s.. Started PCing boolits app 6 mo

ago. MY PC investment is app $30... HF Red, Toaster oven, BBs.

l do my 44 Keiths a hundred at a time. Swirling them around in

a @5 empty Cool Whip container. Bake 25mins @350F.. One part of

the process l must emphasize is to size your boolits the same

day they are coated... While the PC is STILL soft and not fully

CURED... lt takes virtually every of paint app 30 days to cure..

After 30 days the PC becomes brittle and will flake or rub off

during the trip thru the sizer

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#199649 - 05/15/19 07:10 AM Re: Powder Coating 101 [Re: sw282]
45MAN
veteran


Registered: 08/13/17
Posts: 1344
Loc: brownsville, texas

content Online
SW282: HOW SOON AFTER BAKING AND SIZING CAN YOU SHOOT THE BULLETS? i.e. HOW MANY DAYS OF CURING BEFORE YOU CAN SHOOT 'EM? ANY PERFORMANCE DIFFERENCE BETWEEN 1 DAY, 5 DAYS, 10 DAYS, 15 DAYS, etc. OF CURING?
_________________________
"ADAPT OR DIE". I USE ALL CAPS, NOT BECAUSE I AM YELLING, BUT BECAUSE IT IS AN OLD HABIT FROM MY ARMY DAYS, PLUS IT IS EASIER TO TYPE AND READ.

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#199664 - 05/16/19 02:28 AM Re: Powder Coating 101 [Re: 45MAN]
sixshot
old hand


Registered: 11/20/09
Posts: 731

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Rey, I think the only time a regular lubed bullet might be better is if you needed maximum hardness out of your alloy. When you heat treat a powder coated bullet you soften it a bit. You can bring the hardness back up some by water quenching right out of the toaster oven but I've only done that a few times & you don't gain that much BHN.
The very best & toughest cast bullets are heat treated up to just below their slumping point & then usually water quenched. This gives them maximum strength with the correct alloy. And yes they do age harden over time.
Every cast bullet should be sized soon after casting, especially if it's powder coated. I've always said to use Hornady One Shot Case Lube & spray them before running them through a Star sizer, if you don't you stand a very good chance of sticking one or bending your handle.
Some commercial casters will sell you unsized bullets, can't remember which ones but they are out there.
Also, a powder coated bullet can be run very high without a gas check, I call powder coating the poor man's gas check.
Recently a guy ask if he could try some of my plain base 152 gr plain base HP's for a 357 magnum. I sent him a few & he called me today & said he ran them over 1600 fps with superb accuracy, zero leading! He's a gunsmith. I wasn't surprised.

Dick


Edited by sixshot (05/16/19 02:29 AM)

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#199665 - 05/16/19 05:21 AM Re: Powder Coating 101 [Re: 45MAN]
sw282
addict


Registered: 09/01/12
Posts: 506
Loc: CSRA of GA/SC

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[quote=45MAN]SW282: HOW SOON AFTER BAKING AND SIZING CAN YOU SHOOT THE BULLETS? i.e. HOW MANY DAYS OF CURING BEFORE YOU CAN SHOOT 'EM? ANY PERFORMANCE DIFFERENCE BETWEEN 1 DAY, 5 DAYS, 10 DAYS, 15 DAYS, etc. OF CURING? [/quot


l size my PCd boolits the same day, if possible while the PC is

still soft... l prefer to wait about 30 days before shooting.

This gives the PC and lead time to fully cure and stabilize..

l have noticed NO negative results from PC boolits VS lubed ones.

Accuracy is virtually the same. Lots of positives tho...No more

lead contamination from lubed rounds.. Gun is lots cleaner too.

l size my PC boolits with a Lee sizer.. Much faster than Lub a Matic.

l don't personally know how velocity affects my PC boolits because

l am only shooting at pistol velocities... 1400fps MAX..

My casting alloy is range scrap and wheel weights... l don't

enhance hardness by water dropping or adding other metals like tin.

Hardness is likely around 12-14bnh.. Plenty HARD for me!!

One BIG question has been answered to me about the durability

and toughness of the PC coating. Shooting steel metallic targets

l have recovered bases of fired PC boolits after they struck steel..

There's still RED PC on the bases... These black steel targets

have RED smudges on them too.

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#199674 - 05/16/19 07:53 PM Re: Powder Coating 101 [Re: sixshot]
Mech 8
enthusiast


Registered: 08/30/11
Posts: 217
Loc: San Antonio, TX

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This is an interesting topic. My question is how much does the diameter increase due to the powder coating? Could this process be used to increase the size of commercially casted/swaged bullets to achieve a proper fit in over sized revolver chamber throats? Could I use this process on the Hornady .454 255 grain FN Cowboy bullets, and if so, would I have to remove the lube that they apply to them? Could you use a hobby grade rock tumbler for application?

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#199675 - 05/16/19 08:19 PM Re: Powder Coating 101 [Re: Mech 8]
sw282
addict


Registered: 09/01/12
Posts: 506
Loc: CSRA of GA/SC

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l have personally found each coat will be app .001-.002''...

Then size to throat diameter... Don't know about commercially

swaged/cast boolits...Original lube/coating MUST be removed

BEFORE PC paint can be applied... As with ANY surface that is

to be painted, it must be clean and free of all grease or dirt..

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#199683 - 05/17/19 11:47 AM Re: Powder Coating 101 [Re: sw282]
sixshot
old hand


Registered: 11/20/09
Posts: 731

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I had a S&W 25-2 with over size throats & couldn't get it to shoot. Going with powder coating bullets & shooting them unsized fixed the problem, made it into a fine shooting sixgun.

Dick

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#199692 - 05/17/19 08:07 PM Re: Powder Coating 101 [Re: sixshot]
sw282
addict


Registered: 09/01/12
Posts: 506
Loc: CSRA of GA/SC

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That's great to hear six. l have a 25-3 w/ .455 throats.

PC is the CURE

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#199733 - 05/20/19 07:35 PM Re: Powder Coating 101 [Re: sw282]
Pa. Mike
journeyman


Registered: 07/10/09
Posts: 73
Loc: South Central Pa.

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Excellent post Dick , I think you could write a book on bullet casting as you have it nailed down for sure!

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