Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Baffled ???

 
LinkBack Thread Tools Display Modes
  #1  
Old 08-18-2012, 08:20 AM
Platinum Member
 
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,124
Baffled ???

I've been struggling with a persistent problem which I just can't seem to figure out or eliminate.

Working with Rem brass in 338 RUM:

all brass is fully prepped including a careful uniforming of the primer pocket using a Sinclair carbide pocket uniformer, which is non-adjustable

priming with Federal 215M's which measure .127-.128 from top to bottom

i measured the cutting portion of the tool and get .130"

pockets seem to measure .130" deep after uniforming with the tool, as measured with the tail end of my digital calipers

THE PROBLEM - I seat the primers using the priming arm of my Rockchucker press. I have considerable leverage while using the press and can feel the primers bottom out. However, when I place the loaded cartridge in the calipers I can clearly see light all around the protruding primers. Place a cartridge on a piece of glass and it wobbles slightly.

I have tried to use more force than is appropriate to further seat the primers. This will cause a slight flattening of the primer head but does not eliminate the problem.

Exactly what am I missing here?
Reply With Quote
  #2  
Old 08-18-2012, 08:48 AM
Platinum Member
 
Join Date: Apr 2012
Location: The cold part of Montana
Posts: 1,390
Re: Baffled ???

Dial/ digital calipers aren't perfect and can be hard to use in that manner as you've just seen. Their better suited to inspection duties. A depth micrometer is what you should be using. I'm not saying run out and buy one, just whats the correct tool for the job, you can get by with your calipers just fine but realize their far from ideal or perfect, and getting by is what you'll be doing.
__________________
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
Reply With Quote
  #3  
Old 08-18-2012, 09:19 AM
Gold Member
 
Join Date: Feb 2012
Location: Boise, ID
Posts: 695
Re: Baffled ???

I've had problems with protruding primers. I cant remember which primer I was having the problem with but changed to CCI and have no problems since.
Reply With Quote
  #4  
Old 08-18-2012, 09:36 AM
Platinum Member
 
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,124
Re: Baffled ???

Quote:
Originally Posted by Mike 338 View Post
I've had problems with protruding primers. I cant remember which primer I was having the problem with but changed to CCI and have no problems since.
I thought of that too so I picked up some Rem 9.5M and Win WLRM primers.
The Rem's measured .129" and the Win's measured .130", give or take a half thousandth of an inch.

I didn't try to seat either of them because they are actually taller then the Federals.
Reply With Quote
  #5  
Old 08-18-2012, 11:16 AM
Gold Member
 
Join Date: Feb 2012
Location: Boise, ID
Posts: 695
Re: Baffled ???

I'd seat a few and stand the case on end just to see what happens. You can always pop them out. I don't know anything about primer construction but there may be some "crush" designed into primers. At least thats what it feels like when I use a Lee Priming Tool. The primers I was having problems with were protruding 100% of the time and after switching (CCI's), I had 100% no problems.
Reply With Quote
  #6  
Old 08-18-2012, 01:52 PM
Gold Member
 
Join Date: Dec 2008
Location: Boise IDAHO
Posts: 838
Re: Baffled ???

I use the cci without problem. Just measured my uniformer at .131 and a cci250 at .126
Reply With Quote
  #7  
Old 08-18-2012, 03:04 PM
Platinum Member
 
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,124
Re: Baffled ???

Quote:
Originally Posted by D.ID View Post
I use the cci without problem. Just measured my uniformer at .131 and a cci250 at .126
That would put your measurements right about where mine are. The fact that the primer cup protrudes when all the measurements indicate that they shouldn't is what's baffling.

I'm wondering if the primer may be getting taller as its swaged into a narrow pocket. This might explain what is happening but I have never seen this in 35 years of reloading. Hmmmmmmm
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Baffled ???
Thread Thread Starter Forum Replies Last Post
Help! Baffled by High Pressure Signs azsugarbear Reloading 9 08-26-2011 05:02 PM
Brain cramp - completely baffled by turret behavior on Millett 6-25x56 Miller Outdoors Long Range Scopes and Other Optics 3 06-12-2010 03:38 PM

Current Poll
Do you plan to buy a new custom rifle in the next 12 months?
YES - Of course - 72.72%
1,669 Vote
NO - wife/girlfriend won't let me. - 27.28%
626 Votes
Total Votes: 2,295
You may not vote on this poll.

All times are GMT -5. The time now is 05:28 PM.


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