Lothar Walther have gain twist barrel in 30 cal and 338 from 16"-10" twist rate in 26" barrel lenght.
I know they will made anything if you have money.
I know that that barrel have more speed than normal and they seem to be more accurate.
I personaly dont have any proof for anything.
To my logic it is better to have 3 lug but that is me.
But I will say again ,for "Banana" effect on brass it not my words but from David Tubb and that name hase some weight.
Because of banana efect on the brass.
Brass strech more on the area where behind is no lug.
Plus when You have 3 lug forces is better distributed.
On youtube is few videos where tubb explains more stuff.
Look I do not personaly that man.I know somwhere on the web there is article about them and his rifle.
I know Lothar Walther barrel is better than typical American made.
I dont know what is "no accuracy loss" for that man.
But on the other hand ,I myself have SSG08 in 338 Lapua and I myself...
In 300 round in 338???????
At some show I am talking with some Norvegian shooter and he uses 338 lapua with lothar walther barrel and 300 grain pills with N570, long story short he was well over 5000 round and no loss accuray.
So to me that 300 round is very questionable.
Some combination of Partition and eld x m or berger would be very good hunting lr bullet.
Partition with plastic tip and boat tail.
Very good BC and works up close and far away