The Firing Line Forums

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

Reply
 
Thread Tools
Old October 9, 2007, 06:40 PM   #1
McGlockster
Member
 
Join Date: September 7, 2007
Location: Duluth, Minnesota
Posts: 44
O.A.L. Help - .308 Hornady 150 gr. FMJBT

Newbie question here, if you'd be so kind as to enlighten me.......

I'm loading .308 using Hornady 150 gr. FMJBT in Winchester brass using H-Varget powder (43-45 gr. charges) and Remington # 9 1/2 large rifle primers. The load data from a number of sources consistently indicates an O.A.L. of 2.8", but when I seat the bullet the crimp groove is well above the case mouth. If I set the seating die so that the crimp groove is halfway in/out of the case mouth I end up with an O.A.L. of 2.720". I'm using Lee dies (with the factory crimp die). Should I adhere to the 2.8" data, or seat it at the halfway mark of the bullet's crimp groove? BTW - the factory Winchester .308 168gr FMJ HP ammo I have on-hand measures out at 2.706" on the caliper.

Any input would be greatly appreciated.
McGlockster is offline  
Old October 9, 2007, 07:10 PM   #2
Wildalaska
Junior member
 
Join Date: November 25, 2002
Location: In my own little weird world in Anchorage, Alaska
Posts: 14,174
Seat on the crimp groove

WildbulletsareshortAlaska ™
Wildalaska is offline  
Old October 10, 2007, 11:10 AM   #3
sknowskier
Member
 
Join Date: August 10, 2007
Location: Lubbock, Texas
Posts: 36
Have you double checked your case length? My book says it should be 2.015. It also says with 150gr. jacketed SP bullets it should have a 2.685 OAL.
That's in my 47th Edition Lyman Reloading Handbook.
sknowskier is offline  
Old October 10, 2007, 02:10 PM   #4
McGlockster
Member
 
Join Date: September 7, 2007
Location: Duluth, Minnesota
Posts: 44
Ok, thanks Skier - time for me to invest in a few manuals. Thanks for the info.
McGlockster is offline  
Old October 10, 2007, 05:24 PM   #5
30Cal
Senior Member
 
Join Date: December 3, 2002
Posts: 1,101
I would just ignore the cannelure. You don't need it and it's probably in a different place from one bullet to the next.

Ty
30Cal is offline  
Old October 11, 2007, 06:46 PM   #6
Splat!!
Member
 
Join Date: February 13, 2007
Posts: 69
Quote:
My book says it should be 2.015
Isn't that Max length??............ I trim mine to 2.005
Splat!! is offline  
Old October 11, 2007, 07:56 PM   #7
mrawesome22
Senior Member
 
Join Date: November 9, 2005
Location: Ohio, Appalachia's foothills.
Posts: 3,779
Take an empty case. Cut a vertical slit in the neck, barely into the shoulder, with a hacksaw. Barely seat the bullet you want to use in this case with your hands. Chamber this round in your rifle. Eject it with your hand covering the ejection port. Take it out and measure it from base to tip with your calipers. This will give you MAX OAL (over all length) for that bullet. In other words, this bullet is touching the rifling. Now you can experiment with different seating depths. I've found that my rifle usually gives best accuracy .030" away from the rifling. But you'll just have to experiment as to what shoots the best out of your gun. This method works very well and you don't have to waste money on a Stoney Point guage.

You don't need to crimp unless you're shooting an autoloader.
mrawesome22 is offline  
Old October 11, 2007, 08:07 PM   #8
McGlockster
Member
 
Join Date: September 7, 2007
Location: Duluth, Minnesota
Posts: 44
Interesting MrAwesome - I'll give it a whirl.
McGlockster is offline  
Old October 12, 2007, 02:16 AM   #9
Wildalaska
Junior member
 
Join Date: November 25, 2002
Location: In my own little weird world in Anchorage, Alaska
Posts: 14,174
Personally, having tried lots of methods, the Stoney Point is the most accurate

WildevenwithmyhomemadecaseAlaska TM
Wildalaska is offline  
Old October 12, 2007, 01:51 PM   #10
McGlockster
Member
 
Join Date: September 7, 2007
Location: Duluth, Minnesota
Posts: 44
Thanks for the input everyone.
McGlockster is offline  
Reply

Thread Tools

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 03:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07869 seconds with 7 queries