338 Norma Reloading Data

[quaka wacka]

I'm going to switch from the 270 Super Bulldozer and N-570 to the 250 Super Bulldozer II and I have N-565, N-570, Retumbo, IMR7828, a little RL26, and a little H1000 to choose from. Im6thinking N-565......The 250 SBDII has a better bc than the 270 SBD does, will obviously be going faster, which only helps stability and more speed is never a bad thing for a mono.

Knowing these bullets, I will probably just use my load data from the 265 ABLR's and the 250 SBDII, as my data for the 270 SBD closely matched data for the 300 Bergers as far as max charges. Just unsure where to start with the N565, has anyone used it for 250-265 grain bullets? If not I'll update when I get them.

I didn't know there was a 250 SBDII. It's not on their site. What's the BC and what's the min twist rate?

Ive shot 265 CELs with RL26. I couldn't get them to shoot consistently and think it was a stability issue in my 1:9.4.

for reference in quickload-
250 Berger's with N565 show max at 93.7gr and 103% case fill. Depending on your seating depth. This is just over 63K. Peterson brass won't show pressure till your a ways north of 70K

 

[codyadams]

Do the 250's work in a 1-10 twist did they say.Were not out when I got 240

Yup, 10 twist minimum.

 

[codyadams]

I didn't know there was a 250 SBDII. It's not on their site. What's the BC and what's the min twist rate?

Ive shot 265 CELs with RL26. I couldn't get them to shoot consistently and think it was a stability issue in my 1:9.4.

for reference in quickload-
250 Berger's with N565 show max at 93.7gr and 103% case fill. Depending on your seating depth. This is just over 63K. Peterson brass won't show pressure till your a ways north of 70K

It's on their site, here is the link -

.338 250gr Super Bulldozer-2 - Badlands precision, LLC

Length: 1.873″ BC (G1): .800 BC (G7): .410 Twist: 1-10″ Price: 50/BOX

badlandsprecision.com

.410 G7, 10 twist minimum.

What velocity was that 93.7 load at, and what barrel length? I'm figuring around 2950 from my 24"

 

[quaka wacka]

It's on their site, here is the link -

.338 250gr Super Bulldozer-2 - Badlands precision, LLC

Length: 1.873″ BC (G1): .800 BC (G7): .410 Twist: 1-10″ Price: 50/BOX

badlandsprecision.com

.410 G7, 10 twist minimum.

What velocity was that 93.7 load at, and what barrel length? I'm figuring around 2950 from my 24"

Well sheet. I don't know how I didn't see those. I just got 100 of the 240s in the mail. I'll have to order some of the 250s tomorrow.
The QL data was with a 24" and I don't remember the vel but it was 2900-2950ish.

 

[codyadams]

Well sheet. I don't know how I didn't see those. I just got 100 of the 240s in the mail. I'll have to order some of the 250s tomorrow.
The QL data was with a 24" and I don't remember the vel but it was 2900-2950ish.

Perfect. Mine is a 24", so I will aim for 2950 or less to be safe on pressure. Thank you greatly sir!

 

[quaka wacka]

I looked again and N565 max pressure was 2880. RL26 was 2904. The other powders you listed are a little too slow to get to max pressure before you run out of room in the case. Also N560 was right at 2900.

keep in mind these numbers are using a Berger 250 OTM

 

[quaka wacka]

Went and did a seating depth test with 285ELDs and N570 after a very basic powder test.(10 rounds loaded .5 apart and looking for limited vertical at 300) I normally do this as a pressure test, but do a more in depth powder test before moving to seating. 95.5-96.5 had about 3/4" vertical. They were also 5fps ES. So loaded 96gr and started .003 off and moved off the rifling .003 at a time. Seemed to like .010-.013". I'll have to see if I can duplicate it. ES was ok, but I'm going to lighten up on neck tension .001 and see if it shrinks a bit.

 

[David Malcom]

RL33 seems to be the choice powder in both 300/338NM, H1000 second and one i have not tried yet N570 (beside Retumbo on burn chart.)

based on the 416 Rigby case

http://www.lapua.com/en/headlines/3...ucing-.300-Norma-Mag-and-.338-Norma-Mag-brass

they are AWESOME!

I tried , and switched from rl33 to n570. then I bought 16 lbs. of n570 and never looked back.

 

[SheepShapeAK]

Yeah, I need to talk with our local spot to see if I can pay them to order me a bunch of N570 when they place their retail order.
The manager had talked about it, but I wasn't concerned at the time.

 

[quaka wacka]

I've had N570 in my cart 3 times at powder Valley, and it's gone before I can finish checking out.

 

[David Malcom]

I have heard that n570 eats throats, I have not seen that YET. Time will tell.

 

[30dirty]

RETUMBO

 

[SheepShapeAK]

RETUMBO

Yeah, if you can ever find it.

 

[codyadams]

Yeah, if you can ever find it.

It's super easy to find, all you gotta do is go back in time about two years, and BAM almost everywhere lol