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Posted: 9/9/2010 9:26:03 AM EDT
I just recently got into reloading, currently I have only been reloading .223 and now I am looking to reload my 45 long colt.

The question is what is the correct bullet diameter to buy? Wiki lists .454 (lead), .451 (jacketed), others say .452 but that it can vary depending on the gun that you are putting the rounds in.

If that does in fact matter I am going to use these in my Taurus Judge. I assume there are others reloading for this gun what are people using?

-Mike

Link Posted: 9/9/2010 9:38:31 AM EDT
I'm loading 300 gr .454's into my LC's and they fire just fine. Make sure you flare out the cartridge a bit, otherwise you'll shave off some of the bullet.

Lyman lists max bullet dia as .456" so I guess either is fine.
Link Posted: 9/9/2010 11:55:04 AM EDT
The gun does matter, or to be more specific, the dimensions of the chamber throats and groove diameter are what matter. If the chamber throats are .452" and the bore is .451", then use a .452" bullet.

The only guns that should need .454" or larger bullets are the old Cults, and possibly some of the early S&W's. That being said, manufacturing errors do escape from time to time.
Link Posted: 9/9/2010 12:05:08 PM EDT
Do not go to wiki for reloading info

ever

they are open to anyone posting anything, right wrong or indifferent

use a bullet manufactures site, powder manufactures site or get a book
Link Posted: 9/9/2010 12:34:30 PM EDT

Originally Posted By machinisttx:
The gun does matter, or to be more specific, the dimensions of the chamber throats and groove diameter are what matter. If the chamber throats are .452" and the bore is .451", then use a .452" bullet.

The only guns that should need .454" or larger bullets are the old Cults, and possibly some of the early S&W's. That being said, manufacturing errors do escape from time to time.

+1
Excellent post, it's the gun that matters. My Colt Peacemaker 3rd gen. cylinder is .453 I've been using .452 bullets with great results.
Link Posted: 9/9/2010 1:17:38 PM EDT
Originally Posted By 50-140:

Originally Posted By machinisttx:
The gun does matter, or to be more specific, the dimensions of the chamber throats and groove diameter are what matter. If the chamber throats are .452" and the bore is .451", then use a .452" bullet.

The only guns that should need .454" or larger bullets are the old Cults, and possibly some of the early S&W's. That being said, manufacturing errors do escape from time to time.

+1
Excellent post, it's the gun that matters. My Colt Peacemaker 3rd gen. cylinder is .453 I've been using .452 bullets with great results.


Cast or jacketed? If they're jacketed, you should get pretty good accuracy. If they're cast of softer alloy, they will probably bump up a bit to fill the throat.

Any idea what the groove diameter is?
Link Posted: 9/9/2010 10:18:34 PM EDT
Generally speaking .45 Colt has not been .454 since before WWII. Now if the throats are cut large, then fatter bullets often will shoot better even if the actual barrel diameter is smaller.

You can always slug the bore, and check the throats with some pin gauges, but if the gun was made within the past 80 years or so I'd just load .452 lead and call it good. I'm partial to H. Universal in the .45 Colt myself.
Link Posted: 9/10/2010 5:00:55 AM EDT
The way to find out the correct bullet size for your particular firearm is to slug your bore and cylinders. That way you'll know what size bullet to buy for your particular gun.
Link Posted: 9/10/2010 8:19:54 AM EDT
How do you slug a chamber / barrel?
Link Posted: 9/10/2010 11:12:32 AM EDT
Originally Posted By Boosted98gsx:
How do you slug a chamber / barrel?


Drive a soft piece of lead through it then measure

Here is an example of how to do a rifle http://7.62x54r.net/MosinID/MosinSlug.htm
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