Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

More 338LM Issues.

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-27-2012, 12:10 PM
Bronze Member
 
Join Date: Feb 2012
Location: Leadville. Colorado
Posts: 47
More 338LM Issues.

Iv'e been working on load Development for My 110FCP, Have close to 100rnds through it so far. Have tried some loads using US869, H1000 and IMR4831. It seems to like 100gr of US869 and 91.0gr of H1000 the best and pushing Berger OTM's @ .020" Jump so far, I'll tighten that up soon. The issue is the Brass keeps sticking in the chamber and I have to use the cleaning rod to free them, with lite taps only. I don't see any obvious signs of a pressure issue but this is also My first experience with hand loading. Bolt closure is only slightly tight at the lock down point but it's tight to lift the bolt and open it as well. It seems to have only issues with the close to land loads, the .070" jump rounds don't stick at all. Any ideas?? I talked to a Smith who said 99% of the time it's a dirty or tight chamber that could be polished out. Thanks in advance.

HSM (Bertram) Brass 2.714"
Fed 215 match primers
Berger 300gr OTM's
100gr US869 & 91.0gr H1000
Savage 110FCP
26" Tube
9" twist.
__________________
Beva
Reply With Quote
  #2  
Old 03-27-2012, 02:07 PM
Platinum Member
 
Join Date: Apr 2010
Location: Allen, TX
Posts: 2,608
Re: More 338LM Issues.

Quote:
Originally Posted by Leyerly338 View Post
It seems to have only issues with the close to land loads, the .070" jump rounds don't stick at all.
As such, it's not likely a dirty or tight chamber.

It's more likely pressure related. And, your pressure is increasing as you approach the lands.

Either keep it at .070" jump.

And/or, back down on your powder before moving closer to the lands. Then, work up again looking for signs of pressure including, but not limitted to sticky bolt lift.

-- richard
Reply With Quote
  #3  
Old 03-27-2012, 04:28 PM
Bronze Member
 
Join Date: Feb 2012
Location: Leadville. Colorado
Posts: 47
Re: More 338LM Issues.

Going to try some @ .030", .040" and .050" jump with the 91.gr H1000 and a couple 100.4US869 @.050" since I already had them loaded, I just seated them deeper.
__________________
Beva
Reply With Quote
  #4  
Old 03-27-2012, 06:04 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,630
Re: More 338LM Issues.

Sure sounds like pressure to me. I would back it off to 89 gr of H-1000 and see how it acts as far as the sticking issue. The newer lots of H-1000 are said to be hotter than older lots by 3 grains. So this could very well be it as about any 338 LM I have seen is Hot at 92 to 93 gr with old lots.

Are you using Lapua headstamp brass?


Also I dont like the sounds of the "Bolt closure is only slightly tight at the lock down point" either. This could be that you are not getting the shoulder bumped back far enough and need to set the die deeper.

Anyway, I say back her off, and work with seating depth then. You may be playing on the edge of a potential disaster.

Jeff
__________________
Reply With Quote
  #5  
Old 03-27-2012, 06:27 PM
Bronze Member
 
Join Date: Feb 2012
Location: Leadville. Colorado
Posts: 47
Re: More 338LM Issues.

Thanks Jeff, so would what would You recommend for the rounds I already have loaded? I have 3 @.050" Jump with 91.5 of H1000, and 1 ea. of 91.0 @.030",.040" and .050". And 2 @.050" with 100.4 of US869. Another question I'm certain I need to push the shoulder back during re-sizing and thanks for the heads-up. I'm more than a little leary at this point aws I don't want to blow My gun up in My face.
__________________
Beva
Reply With Quote
  #6  
Old 03-27-2012, 06:29 PM
Gold Member
 
Join Date: Jan 2008
Location: NW Montana
Posts: 795
Re: More 338LM Issues.

I ditched H1000 because of pressure problems with newer lots. Had to back my load off 4 grains...No thanks ..
Reply With Quote
  #7  
Old 03-27-2012, 06:37 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,630
Re: More 338LM Issues.

Quote:
Originally Posted by Leyerly338 View Post
Thanks Jeff, so would what would You recommend for the rounds I already have loaded? I have 3 @.050" Jump with 91.5 of H1000, and 1 ea. of 91.0 @.030",.040" and .050". And 2 @.050" with 100.4 of US869. Another question I'm certain I need to push the shoulder back during re-sizing and thanks for the heads-up. I'm more than a little leary at this point aws I don't want to blow My gun up in My face.
You should set them aside or pull the bullets and reduce the charge. I can not speak for the 869 loads but the H-1000 is what I know best in the 338 LM. Remember, pressure is pressure reducing the charge does not mean you are loosing anything, only saving powder really. You should get good velocity just before pressure signs show up.

If the shoulder is too long it can also cause your problem. But lets get the shoulder thing fixed first and reduce the charge and get you safe. Then work with seating depth. You can always work the charge up slowely after the rifle and load are happy and safe. Then you will know for sure what is going on.

Jeff
__________________
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: More 338LM Issues.
Thread Thread Starter Forum Replies Last Post
help with 338lm wbgshooter Rifles, Bullets, Barrels and Ballistics 1 01-08-2012 12:52 AM
Want to transform TWO 338lm to 338lm Imp. padd54 Gunsmithing 0 10-08-2010 05:07 PM
338lm ai dskd Gunsmithing 0 02-11-2010 05:09 PM
338/378 wby vs 338LM demo9pro Long Range Hunting & Shooting 28 05-15-2009 10:13 AM
338 RUM 338LM 340 wby motrapper Rifles, Bullets, Barrels and Ballistics 5 12-23-2007 10:34 AM

Current Poll
Spot & Stalk or Ambush For Western Deer?
MOSTLY - Spot & Stalk - 74.20%
932 Votes
MOSTLY - Ambush - 25.80%
324 Votes
Total Votes: 1,256
You may not vote on this poll.

All times are GMT -5. The time now is 01:17 AM.


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