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Author Topic: 338-378 Weatherby Questions  (Read 28933 times)

Offline Magnum_Willys

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Re: 338-378 Weatherby Questions
« Reply #75 on: March 18, 2020, 06:53:49 PM »
Finished developing load for Uncles 338-378 today.  113.0 gr RL 33.  300 SMK. 
2860-2870 fps.   

Was also load developing Lapua with HBN so targets cluttered.  The 338-378 are shots in lower left quadrant at 960 Yards in 6 mph wind. 

Best is neck-sized,  dip necks in liquid graphite (auto parts spray can) seat to just under mag length.

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Re: 338-378 Weatherby Questions
« Reply #76 on: March 18, 2020, 07:11:12 PM »
 :yeah: That's some good shooting  :tup:
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Offline Magnum_Willys

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Re: 338-378 Weatherby Questions
« Reply #77 on: April 20, 2020, 09:08:33 AM »
Finished tuning Uncles rifle today.  Had a little throat growth so bumped up to 113.5 RL33.
Cold bore at 966 yards.   2850-2870 node. 


Offline Matth

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Re: 338-378 Weatherby Questions
« Reply #78 on: April 20, 2020, 01:26:29 PM »
Nice, i shoot just like that in my dreams.

Offline Magnum_Willys

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Re: 338-378 Weatherby Questions
« Reply #79 on: April 20, 2020, 01:37:04 PM »
Yea my uncles pretty stoked.   Hope new barrel on my Lapua will do as well. 

Offline Matth

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Re: 338-378 Weatherby Questions
« Reply #80 on: April 20, 2020, 02:05:23 PM »
Does your uncles rifle have the factory barrel on it? My 340 shoots lights out with factory, barrel a bedding job, and trigger work.
The 338-378 is bone stock still, and shoots just like the 340 used to.
How many rounds did the HCA tube have prior to needing a new one?

Offline Magnum_Willys

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Re: 338-378 Weatherby Questions
« Reply #81 on: April 20, 2020, 03:00:55 PM »
Yea factory barrel but quality bedding job and reworked trigger plus load development. 

Got about 900 rounds I think on Lapua.  Pushed it pretty hard and rushed cooling a few times.   30” proofs were in stock for $700 so decided to try that.   Like to shoot 2860.   Prob shuda gone Norma but Lapua’s done well.


Offline Matth

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Re: 338-378 Weatherby Questions
« Reply #82 on: April 20, 2020, 03:19:03 PM »
Yea factory barrel but quality bedding job and reworked trigger plus load development. 

Got about 900 rounds I think on Lapua.  Pushed it pretty hard and rushed cooling a few times.   30” proofs were in stock for $700 so decided to try that.   Like to shoot 2860.   Prob shuda gone Norma but Lapua’s done well.

You and Mike almost had me talked into an HCA built Norma a while ago then i got the Weatherby to shoot. Now i have another MarkV to make shooy

Offline Magnum_Willys

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Re: 338-378 Weatherby Questions
« Reply #83 on: April 20, 2020, 03:56:20 PM »
I bedded uncle’s and son’s 378-378’s and they both shoot at least as well as my custom Lapua, darn it.   I’m tweaking my bullet jump  .005- .020 and there’s is like 1/4 inch and kickin my tail.  Heh.  I think the older 338-378's had Bartlein Barrels.    At shorter ranges my Lapua is a little tighter but not by much.    Mite build a 300 wsm with 215 bergers for lighter plinking to a 1000. 
« Last Edit: April 20, 2020, 04:25:13 PM by Magnum_Willys »

Offline Matth

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Re: 338-378 Weatherby Questions
« Reply #84 on: April 20, 2020, 08:48:32 PM »
Lighter plinking to a thousand Ha. Growing up hunting on the west side those are dirty words, but it is fun. When i talk to the rest of the family about it they think i'm crazy. Steven hunts with a muzzy so he just laughs at me. I hunt with a bow in Oregon so i'm super weird says my dad. I am fairly sure your correct about the barrels, my older 340 was easier to get shooting than the new 338-378, even prior to the aftermarket work.

 


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