338-378 Weatherby Questions

[Magnum_Willys]

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.

[bearpaw]

  That's some good shooting 

[Magnum_Willys]

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. 

[Matth]

Nice, i shoot just like that in my dreams.

[Magnum_Willys]

Yea my uncles pretty stoked.   Hope new barrel on my Lapua will do as well. 

[Matth]

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?

[Magnum_Willys]

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.

[Matth]

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

[Magnum_Willys]

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. 

[Matth]

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.