Undersized mold for PC and maybe electroplating ?

What is your opinion about undersized mold ?

i want to make 9mm and .224 (.356 .224 after final sizing)

will try to electroplating copper them, if this not work Powder Coating

for electroplating copper plate thickness could be 0.006 - 0.008 " so simple maths tell that .356 - .006 -.006 = .344 "

but i am afraid that this is "too undersized", if electroplating going bad, then too undersized bullet mold will be trash, powder coating didnt add 0.006"
my first attempts of PC give me only .001 - .002 "


so , maybe . 354 and .222 is good working compromise option ?

i think for PC yes, but for plating ?

how with sizing that plated bullet ?

is possible to size .366 (.354 +.006 + 006) bullet without crack, chop the cooper jacket ?

what you think ?

ps. sorry for my english


regards
Pawel

I think you dropped a 0 after the decimal on your electro plate calculations. Typical home plating such as berry's plated isn't much over .001 thick. More of a copper wash really. Thicker bonded jacket style plating like gold dot takes a lot of electricity and nasty chemicals. As for pc, I just use standard molds and size after coating, the powder is very slick and makes sizing a few thousandth pretty easy.

This thread is my inspiration
http://castboolits.gunloads.com/show...r-than-coating
also few other sources , video from youtube etc.

In short words, looks like it is possible to add .006 - 0.008" at "home plating". (Home plating, but required big chemical purity (oxidation is big enemy), only distilled water, need to use Sulphuric acid and hydrochloric acid but wihout cyjanide

Also i know that there are problem with electricity - becouse process needed big power limited current source , 20-30Amper is minimum for small batch, much better 60-80Amper and took much time.

So i think it is not that easy like PC, but still doable at home.

Anybody with personal experience with undersized molds ?

Here's a thought, try plating with another mould first, maybe a scrap boolit. Then you can see if it your process works and how much diameter gain it yields before you commit to anything.

From the powder coating standpoint (your backup), sizing a 5 mil oversized bullet is not a problem. My 9mm bullets drop at 0.358 and after powder coating, they are typically 0.361-0.362". These bullets glide through the 0.356" Lee push through sizer. I used to size my 9mm bullets to 0.358" to accommodate my 92fs, but now I size all 9mm bullets to 0.356" and get nothing more than soot deposited in the barrels which clean up with a single pass through with a dry paper towel.