[Papakeith]

So far I've only used .451 bullets.

Is there any advantage or disadvantage to one or the other?

[HSMITH]

You talking lead or jacketed bullets? What cartridge are you going to stuff them in? What gun are you going to shoot them from?

[Papakeith]

sorry, one of these days I'll learn to include the pertinant information in my posts.

The bullets would be jacketed.
The cartridge would be .45 ACP
The gun is a SA 1911-A1 loaded

[HSMITH]

The .451" bullets you are shooting are appropriate for the gun and cartridge you are using. Lead bullets should be .452" for your gun to ensure the bore is sealed well and the rifling is able to engrave the bullet with minimal gas leakage.

You are doing it right.

[g56]

Yep, that's right, on 45 ACP it's:

.451 jacketed bullets

.452 lead bullets

[Papakeith]

That's why I'm asking actually. Berry's lists thier jacketed bullets as .452.
West coast lists their plated as .451. I've used WCoast, and had no troubles. I wanted to try berry's, but the size difference made me pause.

[Jim Watson]

My Kart barrel is marked .4515
I have some Magtech .452" FMJs that shoot just fine in it and other .45 ACP barrels just fine, no obvious change from .451" Remingtons. A thousandth of an inch is not going to make any real difference in pressure. Might affect accuracy if you were a slowfire target shooter... but you would have no way of knowing which was better in adavance.

[Car Knocker]

If you were looking at bullets off this page

https://tp-commerce.techpro.com/berrysmfg/shopdisplaycategories.asp?id=2&cat=Preferred+Plated+Bullets

They're plated.

[Mal H]

Yep, I don't believe Berry's even makes jacketed bullets so .452 is the normal size for .45 ACP bullets from them.

[Papakeith]

Once again I am struck down by my lack of editing skills:uhoh:
Yes, that is the berry's page I was referencing.
I know that .001 isn't a big difference. But I've come to realize that it doesn't take much to make a fairly sizable difference with this hobby.

[stans]

Berry's bullets are actually soft, swaged lead with a copper plating, so they have loading characteristics very similar to hard cast lead bullets.

[uglymofo]

Guys, I thought one was supposed to slug the barrel before sending lead down the pipe. Am I wrong?

[stans]

Most modern firearms stick to the standardized bore and groove dimensions for a given caliber. Old firearms often do not. To get the most accuracy out of lead bullets, it is a good idea to slug the barrel and, for revolvers, the cylinder throats. Generally speaking, the 45 ACP will be found with groove diameter of 0.451" to 0.452" and this is fairly uniform in my experience, at least with U.S. made barrels. 9mm can be a different story, you can find groove diameters of 0.353" to 0.357". 45 Colt can also have huge variations.