Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

Pressure Problems......

 
LinkBack Thread Tools Display Modes
  #1  
Old 09-09-2010, 12:25 AM
Gold Member
 
Join Date: Oct 2009
Location: Arizona
Posts: 783
Pressure Problems......

Im shooting a .243 win and my load is 47.3grs of h4831sc, win case, win primers, 88gr berger fb. This load is super accurate at long range. With virgin brass all pressure looks fine other than flattened primers. After one firing Im getting ejector marks with an easy bolt lift. Has anyone else experienced no pressure signs with virgin brass and then once resized they showed up?
__________________
Austin
Reply With Quote
  #2  
Old 09-09-2010, 12:44 AM
Platinum Member
 
Join Date: Oct 2009
Location: Thunder Basin, WY
Posts: 1,788
Re: Pressure Problems......

I've always considered flattened primers to be a sign of approching max pressure. That's what I was taught many years ago, and I've stuck with that since.

If you're close to max w/ virgin brass, and that brass hasn't "swelled" to form to you're chamber dimensions; then you're probably gonna see more pressure signs once the brass is fireformed a little (pressure has less room or space to go before the bullet starts moving). Also, if you got enough case stretch out of one fireing/re-loading; then the necks could be just long enough to be pinching the bullet before release, which would cause more pressure.

Just some ideas, can't say for sure that either one is the case, but when you said flattened primers that was my first thought.

I used to load a 220 Swift to the point of flattened primers and then had to FL size every fireing. This caused enough case stretch that I was trimming the necks every other fireing. I finally had some brass come apart in the chamber (case head separation due to excessive headspace and constant standard FL sizing)
talk about ruin a hunting trip!! Didn't have a cleaning rod/brush or anything to remove the brass that was stuck in the chamber and had to go home early.

All it took to remove it was a .270 bore brush shoved up inside just past the neck and then pull it back out, but when you don't have it with you.........??
After that experience, I started using neck sizing dies, didn't load quite so hot, and when I FL sized; I didn't do it any more than absolutely necessary. Had many many years of trouble free shooting from that gun thereafter. Got better accuracy w/ the somewhat reduced loads too!
Reply With Quote
  #3  
Old 09-09-2010, 01:04 AM
Gold Member
 
Join Date: Oct 2009
Location: Arizona
Posts: 783
Re: Pressure Problems......

Im going to back it off .5 grs and see how that goes.... Thanks for the help!
__________________
Austin
Reply With Quote
  #4  
Old 09-09-2010, 02:14 AM
Platinum Member
 
Join Date: Oct 2009
Location: Thunder Basin, WY
Posts: 1,788
Re: Pressure Problems......

You're welcome,

Hope that the 1/2 grain reduction doesn't hurt your accuracy and good luck.
If you find out anything else or other causes, post back.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Pressure Problems......
Thread Thread Starter Forum Replies Last Post
300 RUM - Pressure Problems George Koch Rifles, Bullets, Barrels and Ballistics 7 12-27-2010 11:48 PM
300 Rum Loads and Pressure or Head Space problems George Koch Rifles, Bullets, Barrels and Ballistics 9 12-14-2010 03:32 PM
Too much pressure? land308 Reloading 9 06-27-2009 07:36 AM
pressure col48 Reloading 6 05-03-2006 08:52 AM
Too much pressure in the 300 RUM? Alucard Reloading 32 04-13-2005 12:32 PM

Current Poll
Where in the US do you live?
West of the Mississippi River - 60.81%
897 Votes
East of the Mississippi River - 36.88%
544 Votes
On the Mississippi River on a houseboat - 2.31%
34 Votes
Total Votes: 1,475
You may not vote on this poll.

All times are GMT -5. The time now is 04:47 AM.


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