Bob Kingsbury
New member
Hoping to shoot Lapua Scenar 108 grain in 6.5.. This is a long bullet
measuring 1.293" will that stabilize in a 1 in 9, or is the 8'' better
measuring 1.293" will that stabilize in a 1 in 9, or is the 8'' better
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6.5---108gr
- Thread starter Bob Kingsbury
- Start date
N
nhkuehl
Guest
twist
According to the Don Miller Twist Rule the unadjusted (for environment) stability factor (Sg) for the 1:9 twist for that bullet would be Sg=1.24 and for the 1:8 twist Sg=1.57. Brian Litz recommends at least Sg=1.4 and less than 2.0.
I've had good luck following that for bullet and twist selection and would use the 1:8 twist if it were me. nhk
Hoping to shoot Lapua Scenar 108 grain in 6.5.. This is a long bullet
measuring 1.293" will that stabilize in a 1 in 9, or is the 8'' better
According to the Don Miller Twist Rule the unadjusted (for environment) stability factor (Sg) for the 1:9 twist for that bullet would be Sg=1.24 and for the 1:8 twist Sg=1.57. Brian Litz recommends at least Sg=1.4 and less than 2.0.
I've had good luck following that for bullet and twist selection and would use the 1:8 twist if it were me. nhk
S
SooStan
Guest
I shooot 144 & 139 Lapua from my 1x8 with no problems. It also handles some old 88 gr. HP very well too. I would go with a 1x8 if it were me. Rifle 260 rem.