338 Norma Reloading Data

[sp6x6]

Like sheep shape, 300 otm and retumbo deadly combo.Taken probably 20+ animals with this in two different rifles, up to moose size. I did take a 6x6,w/BD 240 gr. if I recall for grains

 

[dennisinaz]

88.3 grains H1000
300 grain Lapua Scenar
2797 fps
.2-.3 MOA

83 grains R26
300 grain Scenar
<.2 MOA.
unknown velocity as i switched to H1000 before i set my LabRadar up.
26.5" PBB barrel

 

[dennisinaz]

Lapua vs Peterson brass?

 

[SheepShapeAK]

Lapua vs Peterson brass?

Lapua is putting all their resources into the Ukraine debacle.

I run Peterson because I prefer to support American manufacturing.

 

[SheepShapeAK]

Just out verifying my 300 grain Berger OTM load before next weekends 1000 yard shindig.

26", 1:9.3 Bartlein tube.

88.8 grains of Retumbo and 2.753" base to ogive.

 

[moses42ak]

Just out verifying my 300 grain Berger OTM load before next weekends 1000 yard shindig.

26", 1:9.3 Bartlein tube.

88.8 grains of Retumbo and 2.753" base to ogive.

View attachment 463309View attachment 463310

What velocity are you seeing with that load? I see Birchwood is in good shape.

 

[SheepShapeAK]

What velocity are you seeing with that load? I see Birchwood is in good shape.

It's not going very fast. I was only getting an average of 2730 on the LabRadar.

 

[moses42ak]

Sounds about right. I'm just about out of 7977 and will be switching powders when it's gone. I've got the usual suspects on the shelf so we'll see how it goes.

 

[Lonewolf74]

@SheepShapeAK; do you mind me asking about where you started seeing pressure with the 300 Berger? Any chance you tested for pressure with Retumbo and H1000?

 

[CodyMac746]

I hit pressure at 91-91.5 gr of retumbo and a 300gr Berger. Speed was about 2870fps.

 

[SheepShapeAK]

@SheepShapeAK; do you mind me asking about where you started seeing pressure with the 300 Berger? Any chance you tested for pressure with Retumbo and H1000?

I never worked up to pressure once I had it shooting decent. I've used this load at 1000 yards for our club events and it still performs.

I should try and push it to see where I see pressure. I'll have some time this summer and give it a try.

 

[Lonewolf74]

Thanks for the replies CodyMac and SheepShape.

I'm just trying to get an idea of about where the cutoff should be. My 338 Norma is an improved design so I know I can get more than standard out of it but I don't want to push too hard. My action is very robust at 1.45" diameter, .800 bolt with huge lugs and barrel tenon is 1.35" so I'll probably be in the 80k plus range before seeing pressure signs at all. I'm thinking if I hit about 2900 fps with the 300 grain Berger that's plenty of steam while still well below any danger zone

 

[SheepShapeAK]

Thanks for the replies CodyMac and SheepShape.

I'm just trying to get an idea of about where the cutoff should be. My 338 Norma is an improved design so I know I can get more than standard out of it but I don't want to push too hard. My action is very robust at 1.45" diameter, .800 bolt with huge lugs and barrel tenon is 1.35" so I'll probably be in the 80k plus range before seeing pressure signs at all. I'm thinking if I hit about 2900 fps with the 300 grain Berger that's plenty of steam while still well below any danger zone

Dang. With that setup I bet you could hit 3000 fps.

I should try some N570 with it.

 

[FEENIX]

It's not going very fast. I was only getting an average of 2730 on the LabRadar.

That Sir, is no slouch.