The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Thread Tools Search this Thread
Old March 23, 2023, 06:28 PM   #26
Senior Member
Join Date: February 4, 2020
Location: Tulsa, OK
Posts: 186
Originally Posted by Unclenick View Post
Colt changed the rifling groove diameter to 0.451" well before that. Mike Venturino says he's seen a 1922 Colt factory specification sheet showing the smaller diameter. It suggests that when they started making 1911s for the government, they decided they didn't want to maintain gun drills and reamers and rifling cutters for both sizes. But revolver chamber throats took a lot longer to change. At first, they would just be avoiding obsoleting old ammunition. Later, maybe they were keeping old bullet molds alive. I don't know. I actually can't find any hard dates for the cylinder throats mentioned anywhere, so my comment may have been misplaced. I know Ruger doesn't undersize throats, but I don't really know when other makers may have given the practice up.
I own only two SAA's, one made in 1980 and one made in 1885 with neither being 45 Colt caliber. I have owned Ruger SAA's in 45 Colt and still own many S&W's in that caliber. Never measured a throat - I only shoot for accuracy. I selected what works the best. If I buy factory ammo it is only to get the brass. I have not bought factory 45 Colt ammo in at least 35 years.

I only know what I know because I started reloading around 1985 and at the time Sierra and Hornady offered 45 Colt components with bullets sized to .454". It was maybe 10 years later before I ever saw any bullets sized to smaller dimensions for 45 Colt caliber.
RoyceP is offline  
Old March 23, 2023, 08:14 PM   #27
Join Date: March 4, 2005
Location: Ohio
Posts: 20,463
In general, if a lead revolver bullet is too loose in a chamber throat, it shoots poorly. An extra-tight bore does not have nearly as deleterious an effect on accuracy, though it will make it more important than usual to have a perfectly symmetrical forcing cone and for it's chambers to line up accurately with the bore. So we have a chicken and egg situation wherein oversized throats may cause mold makers and sizing die makers to favor those wide throats to try to get as much accuracy as they can from the wide-throat/narrow-bore arrangement, while the wide bullets make the manufacturers stick to wide throats. How to break the cycle?
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member and Golden Eagle
Unclenick is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 01:10 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Page generated in 0.05006 seconds with 9 queries