n140 powder sierra 155gr tmk and sierra 69 tmk

[ashray]

Good afternoon,has any one loaded the sierra 155gr tmk in a ruger precision rifle , 1in10 twist,20" barrel ,,or the sierra 69tmk in a tikka tac a1 1in8 twist 20" barrel using n140 powder and actually been able to get these bullets to group under 1 moa at 100 yards ?

 

[303British]

I have put 24.5 grn's of N140 behind a 69 for sub MOA through a 1in 8, don't know about the 155's.

Load data on Vit site is good.

 

[20series]

155 's are too light for a 10 twist 308, probably want 175's or heavier

 

[Cyres]

N140 is my go too powder for 69 TMKs in my 1:8 .223.
Silly accurate out of my 26" Border barrel.
D

 

[ashray]

Good morning ,my issue is getting the velocity to stabilize the bullets ,all my rifles are 20" barrels. i have been using lapua scenar and sierra match bullets for 30+ years its just the tmk that are an issue. i happily shoot to 900/1000 yards with the 155 lapua scenars and the 69/77 sierra match to 800/900 no issues but the tmk are a challenge !!