Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

Retumbo Charge Weight

 
LinkBack Thread Tools Display Modes
  #1  
Old 04-28-2012, 02:55 PM
Platinum Member
 
Join Date: Mar 2012
Location: ND
Posts: 2,703
Retumbo Charge Weight

i have a factory savage 110 fcp hs in 338 Lapua and 85 grains of Retumbo in Lapua brass with a 280 grain Barnes Lrx at .100 off the lands is my max load.
Most people with the same rifle are saying that about 90 grains of retumbo with a 300 grain smk or a 300 grain berger otm is their max.
i am just curios as to why my max charge weight is so low? it is going 2737 out of a 26 inch tube. Any help is apreciated
__________________

I'm 15
"Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth."
~George Washington

"The only advantage a light rifle has is weight, all other advantages go to the heavy rifle."
~ JE Custom

Biggest fail of 2014 so far... http://www.longrangehunting.com/foru...ea-ftf-128972/

Last edited by barnesuser28; 04-28-2012 at 04:24 PM. Reason: wrong info
Reply With Quote
  #2  
Old 04-28-2012, 04:08 PM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Retumbo Charge Weight

what is your OAL? you're probably into the lands pretty well, which will run pressures up...

if you're anywhere above 3.700" you might be pressed against the lands... depending on your particular chamber... they're all tight on the Savage rifles...

Dan
Reply With Quote
  #3  
Old 04-28-2012, 04:24 PM
Platinum Member
 
Join Date: Mar 2012
Location: ND
Posts: 2,703
Re: Retumbo Charge Weight

sorry the .100 meant .100 off the lands
__________________

I'm 15
"Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth."
~George Washington

"The only advantage a light rifle has is weight, all other advantages go to the heavy rifle."
~ JE Custom

Biggest fail of 2014 so far... http://www.longrangehunting.com/foru...ea-ftf-128972/
Reply With Quote
  #4  
Old 04-28-2012, 05:05 PM
Bronze Member
 
Join Date: Jul 2011
Location: manitoba, canada
Posts: 80
Re: Retumbo Charge Weight

Hmmm.... Well each rifle is different I suppose... I'd expect a little more velocity outta that lighter bullet compaired to a 300gr bullet... I Guess the Barnes bullet being solid copper means it is going to have to be longer compaired to a lead core of the same weight giving it more bearing surface could be causing more friction and therefor causing u to reach peak pressure sooner....

How is accuracy? Is there much copper fouling? I know the original Barnes bullets were a little more prone to cause copper fouling... That could be causing the problem if there was a whole pile of copper constricting the bore...

Orch
Reply With Quote
  #5  
Old 04-28-2012, 05:09 PM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Retumbo Charge Weight

ok... my bad, I didn't see that when I read your post the first time.

It's gotta be those solid copper bullets then, harder engraving force = higher pressures, but if it's shooting well, all is well...

I use the 300 grain Sierra Matchkings, and 89.3 grains is giving me just at 2700 fps... 92 grains gave me 2800 fps, but pretty flat primers and some ejector swipe... so I dropped it down to the next accuracy node, which I found at 89.3 to 89.5 grains in Lapua brass.
Reply With Quote
  #6  
Old 04-28-2012, 05:21 PM
Platinum Member
 
Join Date: Mar 2012
Location: ND
Posts: 2,703
Re: Retumbo Charge Weight

right now they are shooting .75MOA but i am going to tweak the powder charge a little and try to get it to .5MOA or less.
copper fouling is not bad at all i put one patch of kg-12 and let it sit overnight and in the morning there wasn't any copper left.
i would think that with the bands it would reduce the bearing surface considerably. i posted some pics about a month ago here's a link Barnes 280 Grain LRX Pictures
__________________

I'm 15
"Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth."
~George Washington

"The only advantage a light rifle has is weight, all other advantages go to the heavy rifle."
~ JE Custom

Biggest fail of 2014 so far... http://www.longrangehunting.com/foru...ea-ftf-128972/
Reply With Quote
  #7  
Old 04-28-2012, 05:54 PM
Gold Member
 
Join Date: Feb 2005
Posts: 564
Re: Retumbo Charge Weight

bearing surface, you're right, once the bullet is engraved.

I was talking about the added pressure it takes to get the solid copper bullet into the lands, i.e. the engraving force.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Retumbo Charge Weight
Thread Thread Starter Forum Replies Last Post
Calculating charge for different bullet weight JDMontana Reloading 3 02-05-2012 12:29 PM
charge master vs auto charge DANNY-L Reloading 3 05-25-2011 08:05 PM
.308 charge too hot? odsixer Reloading 6 11-18-2008 10:32 PM
Who's in Charge Out There? Buffalobob General Discussion 9 09-05-2006 04:43 PM
Blackpowder max charge rost495 Rifles, Bullets, Barrels and Ballistics 2 09-09-2004 09:28 PM

Current Poll
Spot & Stalk or Ambush For Western Deer?
MOSTLY - Spot & Stalk - 73.77%
1,021 Vote
MOSTLY - Ambush - 26.23%
363 Votes
Total Votes: 1,384
You may not vote on this poll.

All times are GMT -5. The time now is 12:42 PM.


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