I just took a shot out at 250yds last weekend..
with a DPMS Sportical.. 1/9 twist 16 inch barrel.
Ive got a 30mm red dot mounted on it, now zeroed to group about 2 inches at 100yds.
so I shot one off at a pile of dirt, as I said, bout 250... nailed it, couple inches to the right..
could I tell if the bullet had "keyholed"? nope... but it was on target all things considerd..
now I cant wait to put a 3x9 x 40mm scope on it and see what cam be done out past 300..
its kinda funny, Ive read alot.. but then when I actually got to 'doing', I realized how much of what I read was underestimated, inaccurate, and misjudged.
sometimes folks read things, and consider that "rule"... it happens alot.
Im no pro on twist rate vrs bullet weight... but I know what happens when I do it.
so better than reading opposing opinions, you should try it for yerself, then report with pics.. there is little argument left for "theory" at that point, in yer own mind... as you just did it...
Im curious as to what other people will 'think' will work best in my rifles.... but Ill actually know, because Ill try them, and find one.
ip.
PS, I was using XM193....