DGW1949 said:
1 in 7 is an awfully-fast twist rate for such a slow-moving .30 Cal bullet.
Actualy, it's an awfully-fast twist for ANY .30 Cal rifle.
Remington tried that with their "Blackout" bolt-gun too, and I've yet to see one of those that would group well at all, regardless of what bullet/powder combo was tried.
I think that I'd wait 'n see how the new Ruger pans out before jumping on the band wagon....
....Just sayin'.
DGW
I thought I was going to have this one all to myself but darn, you beat me to it .....
I had (now there's a hint) a Remington 700 16" SPS in 300 AAC - was a gift from my boss. Heavy barrel, brake, HS Precision stock. I very much wanted to like the thing and was looking for a mild 30 caliber plinker. Something I could pop away with accurately around 100 yds and not use alot of powder, bullets in the 135 to 155 range. The Remington didn't work out well.
First, the rate of twist may be great for 190 to 220 grain bullets going subsonic, but not for 135s at about 2,200 fps which is what I was looking for - or anything light for that matter. And 300 BLK brass is a bit of an issue too.
Using cut down 5.56 brass presents a problem. What was the top part of the case body is of varying thickness and that's not good when it becomes the case neck. On some cases the sizing die would slip right through, on others it was fairly tight. And you could feel the difference in case neck tension seating the bullet.
I know there are fixes for this problem - buy good "original 300 BLK" brass. But, you're still left with a rate of twist that doesn't do well with lighter bullets.
BTW, my 300 BLK is being turned into a 6X45 Remington - scored a nice stainless barrel, being 5.56 based the bolt face and feed system remain the same.