338 Norma Reloading Data

[SheepShapeAK]

I am just finishing up a build now. I went with Preferred Barrel Blanks. 26" carbon fiber wrapped 1:9 twist. I want to use 250gr mono also but having trouble finding load data. I have talked to Hornady and Nosler and they have no information. I got some data from Berger but those are not mono. I have a request into Barnes for the 250gr LRX and haven't heard anything back from them yet.

I've got some data for the 250 SBD2.

90.2grains of H1000 was giving me 2900fps in the 26" 5R 9.3 twist Bartlein I had on there.

Haven't done any loads for the 250 in my 1:8 twist yet.

 

[Mike D Texas]

For guys using barrels with faster than a 1-9.5 twist (give or take), where are you sourcing barrels?

Looking for something 9 twist or faster, heavy palma or similar to push 250 gr high bc mono's.

Options seem limited! Fair amount of 9.3, 9.5, 10, 11 twists available however.

Mine is an 8 twist Carbon six barrel.

 

[RH300UM]

The 275 CEB MTH looks like it will work for me
Initial results on load testing are promising
I'll have to order some more 275's to continue

 

[nralifer]

I am just finishing up a build now. I went with Preferred Barrel Blanks. 26" carbon fiber wrapped 1:9 twist. I want to use 250gr mono also but having trouble finding load data. I have talked to Hornady and Nosler and they have no information. I got some data from Berger but those are not mono. I have a request into Barnes for the 250gr LRX and haven't heard anything back from them yet.

I have to develop loads of novel bullets all the time. My method is to look up data for existing mono or nonmono bullets of similar weight in the same caliber and start out at the low end of the recommended powder charge, then proceed to incrementally increase the charge until I see early signs of pressure, usually increases in bolt lift effort.

 

[terry 338rum]

good luck finding 300g berger elite hunter bullets. i have been looking for them for over a year with no luck.