The Firing Line Forums

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

Thread Tools Search this Thread
Old November 2, 1999, 08:20 PM   #1
Join Date: November 2, 1999
Location: Randolph, MA USA
Posts: 38
I've been reloading for a few years ( by the Books). I just started using a chrony to check my loads. I don't get anywhere near the velocities published in the books with their loads. i.e 5.2gr bullseye with a 230 gr hardball produced 765 ft/sec avg. from a 5" 1911. published results are around 835-845. I'd like to increase powder but am wary of pressure. There is no signs of high presure on the 5.2 load. Should I keep increasing load until I get the desired velocity?
Bianchi is offline  
Old November 2, 1999, 09:27 PM   #2
John Lawson
Senior Member
Join Date: August 28, 1999
Posts: 281
Don't increase your loads over book until you determine some things: How much taper crimp are you putting on? If you use an accurate micrometer, you should mike a case, run it into the t. c. die and be able to read .002" reduction in mouth diameter. This is average. Some reloaders go a thousandth more on lead bullets.
Find somebody who has a well proven out load (one that has been chronographed) or buy a box or fmj rounds that will give you a place to start checking your chrony. If it is reading right on the 835 or whatever the velocity has proved out on another chrono or factory velocity on a lot of ammo, you know where to begin. A very small variation in screen distance makes a big difference.
It is best to check your chrony against another chronograph of proven accuracy, if you can persuade some kind handloader to set up on the next bench.
Once you know what the problem is, you can begin experimenting to solve it.
John Lawson is offline  
Old November 3, 1999, 08:37 PM   #3
Senior Member
Join Date: March 11, 1999
Location: The Sunny South
Posts: 2,174
Bianchi, Good advise is posted above but first and foremost your chrono is not their chrono! Your chrono can be a very useful tool for you if you understand a few things.
Given the short screen placements and non repeatability of this setting on hobby chronos you will have some variations. Most of the test data you see has been fired from test barrels that may be longer and tighter than yours.
Do this. Purchase a round with a published velocity that you find in a reloading manual or article and fire it over your rig. Make notes. Make detents, drill holes, take measuring tapes etc. to insure that you set up your chrono exactly the same way and the same distance each and every time and Make notes. Evaluate your loads as to accuracy given the muzzel velocity as shown by your setup and don't worry about what West Simpelton says he did with his 398 Bouywhacker at 1400 yds.
It's a useful tool for me. Your velocities will be your's. Simple enough huh?
Best regards and good and safe shooting

Others here can explain scientific notation and Occam's Razor "?" etc. just be careful and enjoy
HankL is offline  
Old November 3, 1999, 08:47 PM   #4
Join Date: November 2, 1999
Location: Randolph, MA USA
Posts: 38
Thanks Guy's, I did chrono PMC 230 FMJ target load and it measured 835 ft/sec. so I thought I had the chrono set up right. I'll keep trying with the same load before I increase anything.
Bianchi 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 04:11 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2017 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Contact Us
Page generated in 0.06287 seconds with 7 queries