1-7 twist barrel for a 7 SAUM throated for heavies?

[5Baize]

Has anyone got experience using a 1-7 twist long barrel (30") shooting 7 SAUM with 190gr bullets ( LRHy / Atip / 197gr SMK?).

I'm working a specs for a future build, but as I can't find much feedback on such configuration, I'm a bit skeptical that I could be missing something.

 

[whatwind?]

no i havent, but that is a lot of RPM on the bullet, not needed for 190's anyway

 

[Ranger188]

This ^^^^
You don't need a 7 tw.

 

[5Baize]

From what I have already gathered I know I don't "need" a 1:7 twist to stabilise the 190gr.

But the question is about people experience shooting a 1:7 twist 7mm barrel

 

[davidjoe]

I have seen a 1:7 used for 197 SMKs with a saum to good effect. That’s the only match bullet that needs a 7 twist, even though Sierra may not think it’s strictly necessary.

A 7 twist isn’t even an option with some barrel makers. I tried 197’s with an 8, and the problem is that a few of them will group but the others that don’t will be 2-3 feet away at 600, although still nose first.

 

[Willow]

1 to 8 should serve you fine.