View Full Version : 7 mm rem mag rate of twist

June 19, 2009, 08:00 AM
I have having a 7 mm rem mag custom built. Can anyone inform me whether a rate of twist of 9 is appropriate? It will be using 140 and 160 grain bullets.

Jim Watson
June 19, 2009, 09:34 AM
Worked for Remington.
They now list 9 1/4" but that is not a significant difference.

July 8, 2009, 01:41 PM
1 in 9.5in is most common I have seen for factory.

My Parker Hale 1200 shoots 120gr (Ballistic Tip) to 168gr (SMK) about the same, and it is 1 in 9.5 twist.

July 13, 2009, 07:56 PM
If you don't shoot the 175s, a 10 twist is perfect. I shoot an 11 twist in my 7-08AI, since I don't shoot anything heavier than 140gr in that rifle.

July 14, 2009, 11:22 AM
1 in 9 will be perfect.

July 14, 2009, 12:08 PM
IMOE, bbl. length also plays a major role in stabilization. The 160-175's will require longer barrels for tight groups most of the time. The 140-150's should shoot well in most 24" tubes, depending on individual appetite.