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Author Topic: .429-.430  (Read 1182 times)

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Offline cbourbeau32

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.429-.430
« on: May 12, 2007, 01:40:04 AM »
I have a S&W 629 and am shopping for cast bullets for it. I see some sites have a drop down box where you choose .429 all the way to .432 when ordering. Does anyone know which one would be best or should I just buy a few of each and see which one shoots the best? Charlie

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Offline StrawHat

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Re: .429-.430
« Reply #1 on: May 12, 2007, 01:54:20 AM »
An easy way to get in the right area for the correct diameter is to measure the chamber mouth of the cylinder.

There are at least three ways to do it.

1    Use an inside caliper to measure them directly.

2    Using balls or bullets of known diameters keep dropping the in the chamber until one snags in the throat (muzzle end of the cylinder).

3   Using a slightly oversize pure lead bullet or ball, force it through the chamber and measure it with outside calipers.  Use a separate ball for each chamber.

What you are trying to find is the largest chamber throat.  That is where I start when looking for and accurate bullet.

There are other considerations (barrel dimensions and condition) but start with the largest chamber throat and you will be part way there.

Good luck.

StawHat
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Offline safetysheriff

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Re: .429-.430
« Reply #2 on: May 13, 2007, 02:32:12 PM »
i'd go with the .430 as long as it wasn't too tight of a fit in the chamber throats.   if you can push a .430 diameter bullet through the chamber throat with just thumb pressure then that'd be my bullet.

take care,

ss'   
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Offline cbourbeau32

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Re: .429-.430
« Reply #3 on: May 13, 2007, 03:12:59 PM »
Thanks for the replies. I will go with the .430 if it will load. Thanks, Charlie
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Offline S.B.

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Re: .429-.430
« Reply #4 on: June 04, 2007, 03:48:19 AM »
Quote from: StrawHat on May 12, 2007, 01:54:20 AM
An easy way to get in the right area for the correct diameter is to measure the chamber mouth of the cylinder.

There are at least three ways to do it.

1    Use an inside caliper to measure them directly.

2    Using balls or bullets of known diameters keep dropping the in the chamber until one snags in the throat (muzzle end of the cylinder).

3   Using a slightly oversize pure lead bullet or ball, force it through the chamber and measure it with outside calipers.  Use a separate ball for each chamber.

What you are trying to find is the largest chamber throat.  That is where I start when looking for and accurate bullet.

There are other considerations (barrel dimensions and condition) but start with the largest chamber throat and you will be part way there.

Good luck.

StawHat

I'm confused with using only the chamber dimensions instead of barrel dimensions?
When I started reloading, years ago, I was told to use a soft lead bullet(not sized) and drive it througjh the bore and then mike it
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Offline Mikey

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Re: .429-.430
« Reply #5 on: June 05, 2007, 03:57:30 AM »
I'm with S.B. on this.  It was either a soft lead bullet or a lead sinker large enough to deform to the concentrics of the bore.  Mikey.
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Offline OLDHandgunner

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Re: .429-.430
« Reply #6 on: June 05, 2007, 09:07:07 AM »
Agree with S.B. That's called slugging the barrel. Do it all the time with a new gun. Just to make sure of the bore diameter. Not all guns shoot the same with the same bullet. If you're looking for the best accuracy for a given gun, you have to try alot of different loads and bullets. Keep notes on each gun as to what it's favorite load is. Don't try to remember, write it down. It will save you alot of time when you have many guns and no memory like most of us.  ;D ;D ;D
Most of my 44's like the .430 cast bullets.

GOOD LUCK
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Offline Graybeard

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Re: .429-.430
« Reply #7 on: June 05, 2007, 09:27:38 AM »
For accuracy matching chamber throat dimension is more important than matching barrel diameter so long as the throat is as large as or larger than the bore diameter. If the throat is smaller than bore nothing you do other than opening the throats will help.
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Offline Ken ONeill

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Re: .429-.430
« Reply #8 on: June 05, 2007, 01:52:51 PM »
Graybeard's 2 sentences said it all.
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Offline S.B.

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Re: .429-.430
« Reply #9 on: June 10, 2007, 04:00:50 PM »
OK, I've been away from machine work for several years but, I have found my small hole telescoping gages and measured the throats on my 629-4  .44 M/G, they go .429+ or - a tenth (1/10,000), or two and my bore slugs at .429, so, what size dies should I be using for this gun? Would .430 work or should I stay with the .429s? Seems like I can remember reading that a one thousands over won't hurt anything.
My model 57's throats go in the .411 range, + a tenth or two,  haven't slugged the barrel yet.
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Offline Drilling Man

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Re: .429-.430
« Reply #10 on: June 10, 2007, 04:34:53 PM »
  I size all of my 44 bullets at .430" and i've never had a problem.  I sold thousands and thousands of cast bullets sized that way without even one complaint coming back.

  Also, i've won "more" than my share of long range pistol matches using my own cast bullets in different guns, so i know they shoot well too...

  DM
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Offline S.B.

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Re: .429-.430
« Reply #11 on: June 10, 2007, 04:48:59 PM »
Let's suppose your bore is .429 and your shooting .430 bulllets, now how does that affect pressure or velocity?
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Offline Dusty Miller

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Re: .429-.430
« Reply #12 on: June 10, 2007, 07:05:49 PM »
With lead bullets it ain't no problem. ;)
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