Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Cornmeal forming bad on a new barrel??

 
LinkBack Thread Tools Display Modes
  #15  
Old 01-24-2004, 06:04 AM
PUBLISHER
 
Join Date: May 2001
Posts: 5,830
Re: Cornmeal forming bad on a new barrel??

Interesting thread. I will be forming .284 wildcat cases from .338 Lapua cases. Do you think the extra amount of neck size reduction (over that of .338 down to .308) will require any changes in method?

[ 01-24-2004: Message edited by: Len Backus ]
__________________


Long Range Hunting Rifles

Long Range Rifles, LLC - Ready To Ship

Components and assembly by LRH Sponsors
Reply With Quote
  #16  
Old 01-24-2004, 07:02 AM
Bronze Member
 
Join Date: Aug 2002
Location: N.W. PA
Posts: 31
Re: Cornmeal forming bad on a new barrel??

Len

I would turn necks before fireforming.
I make my 338 tomahawk cases from 375 ultra mag brass and turn before fireforming and cases come out perfect

Tomahawk#1
Reply With Quote
  #17  
Old 01-24-2004, 08:31 AM
PUBLISHER
 
Join Date: May 2001
Posts: 5,830
Re: Cornmeal forming bad on a new barrel??

Tomahawk

You're probably right but please explain why. My 7 Lapua's reamer's neck dimension will be .3150. I know from the experience with my 7mm Dakota that if I take off about one thou in turning that particular brand of brass, then my loaded round will measure .3113 for about .0037 total clearance.

With the 7 Lapua Improved project, in forming the neck down further, as stated above, will I get thicker necks and therefor have to experiment with a few unturned necks in fireforming before I then go ahead and turn a bunch of brass in advance of fireforming?
__________________


Long Range Hunting Rifles

Long Range Rifles, LLC - Ready To Ship

Components and assembly by LRH Sponsors
Reply With Quote
  #18  
Old 01-24-2004, 10:01 AM
Bronze Member
 
Join Date: Aug 2002
Location: N.W. PA
Posts: 31
Re: Cornmeal forming bad on a new barrel??

Len

I would try a few as you stated but i think you will gain neck thickness when you take them down to 7mm

Tomahawk#1
Reply With Quote
  #19  
Old 01-24-2004, 01:03 PM
PUBLISHER
 
Join Date: May 2001
Posts: 5,830
Re: Cornmeal forming bad on a new barrel??

Yes, I thought so. I assumed I'd have to take more off if I want that same .3113 loaded dimension.
__________________


Long Range Hunting Rifles

Long Range Rifles, LLC - Ready To Ship

Components and assembly by LRH Sponsors
Reply With Quote
  #20  
Old 01-24-2004, 10:16 PM
Bronze Member
 
Join Date: Aug 2002
Location: N.W. PA
Posts: 31
Re: Cornmeal forming bad on a new barrel??

Len

It would be interesting to know how much neck thickness you gained going from 338 to 7mm.

Tomahawk#1
Reply With Quote
  #21  
Old 01-25-2004, 03:12 AM
Platinum Member
 
Join Date: Jun 2001
Location: Palmer, Alaska
Posts: 2,539
Re: Cornmeal forming bad on a new barrel??

Len,

<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>Interesting thread. I will be forming .284 wildcat cases from .338 Lapua cases. Do you think the extra amount of neck size reduction (over that of .338 down to .308) will require any changes in method?<HR></BLOCKQUOTE>[

What's your neck length on this one going to be?

Have you go another die for this one, or where you planning on using the 30/338 LI die and smaller bushings?

Is this one just a necked down version of your 30/338 Lapua Imp, with the neck a tad shorter from necking it down smaller than 30?
__________________
Brent Moffitt
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Cornmeal forming bad on a new barrel??
Thread Thread Starter Forum Replies Last Post
Cornmeal fireforming...COW? jmden Reloading 7 02-15-2008 10:30 AM
Forming 25-06 from Lapua 30-06 stripes Reloading 8 02-17-2007 09:31 PM
270 AM Fire Forming? srhaggerty Reloading 3 10-06-2005 10:16 AM
Fire-Forming? skip AI Reloading 15 04-26-2005 07:33 AM
338 300 RUM forming question abinok The Basics, Starting Out 5 12-17-2004 12:42 PM

Current Poll
How Many Different Cartridges Do You Reload For?
ZERO, all factory ammo - 8.06%
358 Votes
1 - 2.79%
124 Votes
2 or 3 - 14.62%
649 Votes
4 or 5 - 20.45%
908 Votes
6 or 7 - 14.77%
656 Votes
8 or 9 - 8.58%
381 Votes
10 or more - 30.72%
1,364 Vote
Total Votes: 4,440
You may not vote on this poll.

All times are GMT -5. The time now is 09:33 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC