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Need help ordering barrel .243

Need help ordering barrel for .243 I’m planning on shooting DTAC 115gr; I’m trying to find out my best option on barrel twist, groove, and length. Any help will be appreciated.
 
1:7.5" twist minimum,true twist rate). A 1:8" will stabilize, at high enough speeds, but the 1:7.5" gives you a margin of safety.

Barrel length--depends on your discipline, but I'd suggest from 27" to 30". The extra velocity you get will depend on a lot of things--powder, bore diameter etc., but with a .243, you'll probably pick up about 15 fps per inch.,When we tested a 6BR, the average increase in velocity from 28" to 33" was just 8 fps per inch).

As to brand, Broughtons, Kriegers, Schneiders, PacNors and others have been very successful with the 115s.
 

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