338LM or 338LMAI Velocity

[Coyote Shadow Tracker]

What velocity are shooters getting out of the 3338LM or the 338LMAI, Lapua Brass, Retumbo (or other powder) and with 300 gr OTMs?

Thanks
Len & Jill

 

[Rhovee]

I just had a 26" barrel spun up for 338 LIMP. N570 is 2900 with 300smk. So Berger might be a tad faster. Shoots really good. Just don't build it to light

 

[jskmtd]

338 LIMP 28" Barrel and 300 Berger OTM with N570 and Lapua brass I get 2918 fps.

 

[Rhovee]

338 LIMP 28" Barrel and 300 Berger OTM with N570 and Lapua brass I get 2918 fps.

103 grains?

 

[BAKPAKR]

In my 27" 338 LM, I am getting 2750 with Retumbo and 300 gr Elite Hunters.

 

[sp6x6]

I shot that in my NM338 2750/RETUMB0 300otm

 

[Barehandlineman11]

28" 102.5 n570 2967
30" 103.8 n570 3050
30" 101.7 n570 2980
30" bull barrel 103.5 h50bmg 2927
All proof barrels, 300 otm 40* lapua improved

 

[jskmtd]

Rhovee
I use 100.6 of N570.

 

[Shane Lindsey]

Standard Lapua cheapo 26" Savage barrel 2800 FPS with 90.8gr N570.

Where are you all ordering your go gauges and dies from on these improved cases?

 

[Coyote Shadow Tracker]

Standard Lapua cheapo 26" Savage barrel 2800 FPS with 90.8gr N570.

Where are you all ordering your go gauges and dies from on these improved cases?

Go gauges are the same as 338LM. Get Foster they are 1/2 to cost of JGS. Dies from Widden for the IM.

EDIT:
We ordered several Reamers and "GO" Gauges and when we received them I looked for the 338LMAI "GO Gauge and we had a 338LM GO Gauge in our package. I called the manufacture and asked about the 338LMAI GO gauge and the person said that the 338LM GO Gauge works with the 3338LMAI.
That is not true. The AI GO Gauges are cut shorter by .0004 and the actual 338LM GO gauge will actually work as a "NO GO" Gauge for the 338LMAI.
So when using a "GO" gauge for the 338LMAI it needs to be marked 338LM GO-.0004 2.2490.

Sorry for the misinformation.
Len

 

[Shane Lindsey]

I have the Manson go gauge for the standard Lapua case. Glad that works. Thanks

 

[jimbires]

you guys shooting the 338Lapua improved . could you tell me your fired case water capacity ? thanks


Len , I have a plain 338 Lapua , with a 30"bbl . shooting 300 gr Berger E hunting bullets using RL33 , 2930 FPS . I did play with the 300 gr Nosler custom competition bullets RL33 2934 FPS .

 

[Terry Scott]

Shooting one of Carlock's defensive edge
338 with 300 gr Bergers @3050 fps
100 gr of N570 28 inches I think
Very similar. Tried other powders but 570 is magic

 

[Coyote Shadow Tracker]

you guys shooting the 338Lapua improved . could you tell me your fired case water capacity ? thanks


Len , I have a plain 338 Lapua , with a 30"bbl . shooting 300 gr Berger E hunting bullets using RL33 , 2930 FPS . I did play with the 300 gr Nosler custom competition bullets RL33 2934 FPS .

Jim
Our .338LMAI Reamer is from JGS and throated it for 300 OTMs. Got two Kreiger barrels 1:9.35 and 33". Don't know what length to finish but most likely 32" and can work from there. Going to shoot ELR with it so hoping to get at least 3100FPS +.
We have Retumbo.
Thanks
Len & Jill