Sizing after PC...is it a must?

[fredj338]

I size all my bullets regardless of caliber but especially in 9mm. There are so many variables in brass & final bullet size that sizing just saves headaches in reloading. I bought a Lee APP for bullet sizing, very fast & cheap.

[DougGuy]

Generally, yes - but slug your bore first and then measure the diameter of your PC'd boolits; if they're only a thou' or so oversized versus the bore, you're good. If not, then size 'em.

Size to fit the throat not the bore.

I don't know that a lot of factory barrels will even chamber a round .001" to .002" greater than groove diameter of the barrel, -without- being throated first.

[justindad]

Does anyone cast boolits for PC that are slightly undersized relative to lube style boolits?
*
I’m thinking about getting a mold from Accurate, sized to groove diameter, and then letting the PC bring the final result up 0.002” over groove dia.

[charlie b]

Yes. When I ordered my molds from Accurate I take into account the PC thickness and spec them accordingly.

Just remember that if it says +/- .002 then whatever the minimum is should still be OK with you.

Sent from my SM-P580 using Tapatalk

[gunnie]

Depends on what size the mould throws & desired end size.
I will size before & after coating to ensure the correct size. Others will only be before coating & for one (38S&W in a Webley) only after coating.

[AndyC]

Size to fit the throat not the bore.

I don't know that a lot of factory barrels will even chamber a round .001" to .002" greater than groove diameter of the barrel, -without- being throated first.

That's more technically accurate - good catch, but I still want to know the bore size.

[Dragonheart]

Maybe a better question is do you buy bullets for a 38 Special to load in your 9mm? Do you buy.303 bullets to load your 30/06? Why not, because it is the same reasoning or lack thereof.