Interesting post from PA

[StoneHendge]

Faxon barrel shown in the article, 1:7 twist.
https://www.primaryarms.com/faxon-firear...6.5_vs_224

I just had to go check Sierra's site. All the original barrels were 1:7. The Valk didn't work. So Sierra said the 90s needed a 1:6 or 6.5. ARPs 1:6.5 was a disaster with 90s. Now Sierra is saying it needs 1:6.5. Unless MV is over 2650. Then 1:7 is ok. Lol.

Note that they say the bullet was designed to be single fed in 223 and not mag fed.