375-338 Lapua Imp build help

[Butler12]

Hi,
I am just wondering if anyone has built one of these lately.

I was just wondering what reamer you are using and where you get your dies from ? I like the look of the 375 Allen Xpress but wondering if I can get the dies?
I was thinking off building one as I have a good supply of 338 Lapua brass and I was thinking of going a 1 in 10 twist so I might be able to use flatlines or other turned bullets for steel as well as hunting bullets as this we be a ELR steel target - hunting build .
I will be using a 32" barrel to try and get as much performance as possible.

 

[Dan Warner]

I'm sure you will get a variety of responses here. I might suggest a 9 or an 8.5 twist if you plan to shoot the Flatline 361g on a regular basis. The 10 will work, but a little faster will be to your advantage with stability; no need to be at the minimum out of the gate. The 361g Flatline was actually tested in a necked up 338 Lapua improved, so it is essentially the same thing you are looking for and we have all the specs for it. Dies are not a problem, regardless of your choice of chambering.