Hello,
I'm thinking about building a .510 Whisper ( or similar if you can argument that something else is better)
I have read that the 750gr Hornady AMAX performs the best. I would intend to shoot up to 300meters at subsonic velocities projectiles 750gr and up. I would not like to have the barrel longer than 18".
I read from
http://www.quarterbore.com/300whisper/sskwhisper.html that the .510 Whisper is capable of MOA accuracy at 600 meters. But there is no info about the barrel lenght, make, twist rate and projectile.
Some people say 1 in 10 is enought but I have allso heard form a reliable source that 1 in 6 plus minus is needed.
Lothar Walther can make up to 1 in 10 but i know a smaller gun smith that can make up to 1 in 7 from a special order.
Could you explain me whats the neccecary twist rate, and where can I get this barrel blank from? Lothar Walther barrels are the easiest for me to get.
Sincerely from Finland
- Jope