« previous next »
Pages: [1]   Go Down

Author Topic: Loading for the 338-378 WTHBY  (Read 289 times)

0 Members and 1 Guest are viewing this topic.

Offline Sourdough

  • Trade Count: (1)
  • Senior Member
  • *****
  • Posts: 8150
  • Gender: Male
Loading for the 338-378 WTHBY
« on: August 05, 2006, 09:24:51 AM »
Does anyone load for the 338-378 Weatherby?  I am currently loading using the Nosler Manual.  While my accuracy is great, the trojectory is not what I think it should be.  Using the Nosler 225 Accubond bullet, I worked my way up slowly to the max, of 104gr of IMR7828.  There is no high pressure signs, but I am dropping too much at 300 yards.  At 200 I am 5" high, but at 300 It drops to four inches low. 
Logged
Where is old Joe when we really need him?  Alaska Independence    Calling Illegal Immigrants "Undocumented Aliens" is like calling Drug Dealers "Unlicensed Pharmacists"
What Is A Veteran?
A 'Veteran' -- whether active duty, discharged, retired, or reserve -- is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today who no longer understand that fact.

Offline PaulS

  • Trade Count: (0)
  • Senior Member
  • *****
  • Posts: 1120
Re: Loading for the 338-378 WTHBY
« Reply #1 on: August 05, 2006, 01:08:22 PM »
Quote from: Sourdough on August 05, 2006, 09:24:51 AM
Does anyone load for the 338-378 Weatherby?  I am currently loading using the Nosler Manual.  While my accuracy is great, the trojectory is not what I think it should be.  Using the Nosler 225 Accubond bullet, I worked my way up slowly to the max, of 104gr of IMR7828.  There is no high pressure signs, but I am dropping too much at 300 yards.  At 200 I am 5" high, but at 300 It drops to four inches low. 
Some quick math tells me that your bullet is leaving your muzzle at around 2500 fps to get the trajectoy that you describe. Do you have a chronograph? IMR7828 is a real slow powder for the bullet, have you tried 4350 or H450?
Logged
PaulS

Hodgdon, Lyman, Speer, Sierra, Hornady = reliable resources
so and so's pages on the internet = not reliable resources
Alway check loads you find on the internet against manuals.
NEVER exceed maximum listed loads.

Offline ricciardelli

  • Trade Count: (0)
  • Senior Member
  • *****
  • Posts: 1004
  • Gender: Male
    • http://stevespages.com/page8.htm
Re: Loading for the 338-378 WTHBY
« Reply #2 on: August 06, 2006, 05:44:39 AM »
RL-25 From 96.8 grains to 113.0 grains
 Remington 9-1/2M Primer
Logged
Pages: [1]   Go Up
« previous next »