Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

338-378 weatherby load data

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-16-2013, 06:43 PM
Bronze Member
 
Join Date: May 2005
Location: Northern Alberta
Posts: 98
338-378 weatherby load data

My buddy dropped off his 338-378 with me to develop a load. I'm thinking of loading 300 grain bergers. I can't get my hands on a berger manual. Anyone have one and willing to share the data. I was thinking of H1000 or Retumbo.

Alternatively I was thinking of 250 grain accubonds or 250 grain bergers.

Any info would be appreciated.

Thanks
Reply With Quote
  #2  
Old 03-18-2013, 05:23 PM
Bronze Member
 
Join Date: May 2005
Location: Northern Alberta
Posts: 98
Re: 338-378 weatherby load data

Anyone? Anyone willing to share the load Data from the Berger manual for 250 and 300 grain hybrids?

I bought the new Nosler book and have the info for the Accubonds. I just cant find a Berger manual.

thanks.
Reply With Quote
  #3  
Old 02-23-2014, 10:18 PM
Silver Member
 
Join Date: May 2013
Location: Elkhorn Idaho
Posts: 422
Re: 338-378 weatherby load data

All that I have worked on with the factory freebore have digested the Barnes LRH or ttsx whichever you want to call them very accurately. The 265gr does great as well as the new 280 gr. Do not get this confused with the old 285gr. RL 25 so far will give the best accuracy and velocity. I have not used the new RL 33. Waiting for warmer weather to get out to work up loads. MRP-2 was the best until it was discontinued and I can not get its replacement due to the democrats. Use the Winchester Magnum Primer. Not the 215 that everyone states is the best. Load to 3.8 coal and work the rl 25 from 109 gr up until pressure signs. Only go 1 gr at a time 109 is starting within a few grains that you will be ending at. RL 25 is temp sensitive . The new RL33 is not. I hope it can improve upon the 25 but it is going to be hard. let us know how this works for you. It will outpound any 338 edge that all have made famous and is running on the heals of the other wildcats in factory form. If you really want to pump up the power then HEX coat the bullets and bore. The 250 Accubond did ok and I can not wait to try the new 285 a max. All 300 gr bullets seat to deep and the ogive distorts due to powder capacity. Its taken thousands of dollars and hundreds of hours to figure this out. Hope this helps. Yes Bergers shoot like **** out of this caliber as well as Sierras. Why go less than 250 gr is beyond me why people even do this. If you want a 338-06 then buy one.
Reply With Quote
  #4  
Old 02-23-2014, 10:47 PM
Bronze Member
 
Join Date: May 2005
Location: Northern Alberta
Posts: 98
Re: 338-378 weatherby load data

I actually got this beast to shoot really well. 300 grain bergers on top of 101 gr of h1000. I
Have only shot it to 500 yards and .5 moa all the way to 500. Once the weather warms up we are gonna stretch it out.
Reply With Quote
  #5  
Old 02-23-2014, 11:07 PM
Junior Member
 
Join Date: Nov 2013
Location: lebanon oregon
Posts: 14
Re: 338-378 weatherby load data

I run mine with 101.7 grains of h1000 behind the 300 Berger. Or 110 grains of reloader 33
Reply With Quote
  #6  
Old 02-24-2014, 07:31 AM
Silver Member
 
Join Date: Oct 2005
Posts: 106
Re: 338-378 weatherby load data

I havn,t tried either of those powders yet, but mine realy likes h 50 bmg it shoots so good I,am not trying anything else started at 108 and ended up at 112.5 My 338 big baer also like it at 141.5 gr. I went and got 3 8# jugs of it It should out last me HaHaHa
Reply With Quote
  #7  
Old 02-24-2014, 10:15 AM
Silver Member
 
Join Date: May 2013
Location: Elkhorn Idaho
Posts: 422
Re: 338-378 weatherby load data

I am amazed that you and others have good luck with the Bergers in this caliber. I have never had anything shoot with SUBSTANTIAL velocity in this caliber. It goes into compaction in the case and distorts the bullet. RL 25 is the ticket to be fast enough but it ripps the Bergers apart. Nose slump and ogive distortion is the issue. Are you using a true chronograph? Load books are so far off I do not think your getting over 2700 to 2800 on your loads. I built no less than 23 of these and in a 26 in tube they are not reaching the velocity that people think they are. I hope the new Hornady might hold up but I would be willing to bet not. The 250 accubond and Barnes ore the only ones I can get to do the job with velocity.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 04:20 PM.


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