85 gr 5.56, says 1-7 twist...

kbf64 · Jul 13, 2020

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If I have 1-8 twist, can / should I use this?

DizzyJ · Jul 13, 2020

Man, that's really going to be pushing it. Good chance your twist is not going to be fast enough to stabilize those bullets.

That said, I get amazing accuracy with 77gr pills out of my 1:9 twist Savage.

Ultimate answer is, you'll have to try it to find out. I would'nt buy a bunch though till you know for sure.

ron · Jul 14, 2020

No these are for a 1/7 twist barrel like the 90 SMK. Specialty long range bullet needs a 1/7 twist to stabilize.
Loaded long on or a few thousands off the lands. A real barrel burner.

Short barrel life.

Medic! · Jul 14, 2020

You know.
Length matters.

trevi · Jul 14, 2020

ron said:
No these are for a 1/7 twist barrel like the 90 SMK. Specialty long range bullet needs a 1/7 twist to stabilize.
Loaded long on or a few thousands off the lands. A real barrel burner. Short barrel life.

How is the 1:7 twist a barrel burner over the slightly slower twist? I am not aware that long-for-calibre bullets shorten the life of a barrel, only the super fast cartridges like 220 Swift, 6.5-300 Weatherby, to name a few.

titsonritz · Jul 14, 2020

Medic! said:
You know.
Length matters.

BLM

Barrel Length Matters. :s0131:

DizzyJ · Jul 14, 2020

Medic! said:
You know.
Length matters.

So does how fast you push it and how fast you twist it.

Certaindeaf · Jul 14, 2020

trevi said:
How is the 1:7 twist a barrel burner over the slightly slower twist? I am not aware that long-for-calibre bullets shorten the life of a barrel, only the super fast cartridges like 220 Swift, 6.5-300 Weatherby, to name a few.

Yea, it seems counterintuitive to me too. All else being equal, less powder means less barrel erosion is how I figure.