308 with 18" barrel load data help needed

[Steven mclean]

Evening all,was wondering if anyone is shooting a 308 with an 18" barrel and what load data you got to work with it ?
I have tried vhit n140 with grains of powder ranging from 39 to 41 with a hornady eld 168 grain projectile, 5 shot groups 3 close and 2 way off.
Tried vhit n133 with grains ranging from 35 to 38 with the same horrnady projectile...seen some improvement with groups but nothing to write home about..
Any suggestions would be welcomed

 

[Sampo]

What's the twist rate of the barrel? Unless it is 1:11 or 1.12, the bullet will be either over or under stablised.

The following links might be useful - Gyroscopic Stability Calculator - Bullet Length - .308 Winchester Load Data Vihtavuori

 

[Steven mclean]

Twist rate is 1:8

 

[Steven mclean]

Sorry it's a 16" barrel

 

[HandB]

My 18 inch barreled .308 likes 180gr bullets with 42gr N150.

 

[Fabnosh]

Hi there
This load has been fantastic - 5 shots at 100m covered by a 5p piece.

165grn Sierra Game Kings Spitzer #2145
42.5grn Vhit N150
CCI large rifle primers
COL 70.9mm
chrono at 2455fps

Hope that helps

FN

 

[foxpro]

Rs 52

 

[malmick]

What's the twist rate of the barrel? Unless it is 1:11 or 1.12, the bullet will be either over or under stablised.

The following links might be useful - Gyroscopic Stability Calculator - Bullet Length - .308 Winchester Load Data Vihtavuori

Have you followed this hint?

 

[tackb]

Twist rate is 1:8

That is a fast twist for 308 , great for subsonic heavy bullet loads though!

Try the 208amax bullet and see how you get on

Or get a more standard 308 twist like 1-11/1-12 and use 150-168gr bullets

 

[scotch_egg]

1-8” twist shouldn’t be adversely affecting accuracy.

I would be putting some factory through it to see if there is some consistency of 5 shot groups.

 

[half-baked]

What a sweet rifle! Could you please tell us more about it? Have you tried any subsonic loads? Methinks a suppressor would be in order, nevertheless.

Seeing that you have tried different powders but just one projectile, I would humbly suggest you to try another bullet.
For example, the 175 gr Lapua Scenar has been reliably accurate on quite a lot of rifles, and then some.

 

[Steven mclean]

What a sweet rifle! Could you please tell us more about it? Have you tried any subsonic loads? Methinks a suppressor would be in order, nevertheless.

Seeing that you have tried different powders but just one projectile, I would humbly suggest you to try another bullet.
For example, the 175 gr Lapua Scenar has been reliably accurate on quite a lot of rifles, and then some.

Hi yeah no problem it's a desert tech srs bullpup rifle with switch barrel capabilities..I have the silly small 308 barrel and a normal length 6.5 creedmoor barrel.
I plan to try some different weights in projectiles and see how that works out I haven't tried anything subsonic yet.
To give you an idea of how short it is here is it next to my 44 magnum taurus lbr

 

[half-baked]

"Compact" does not begin to describe that. Very, very nice.

 

[KimE]

Try Hornady flat base 165gr SP it shoots well in my 308w.
Hornady 110gr Vmax works well in my 1/8 300blk.

 

[fresh slots]

I shoot a .308 with a 1:10 twist 16” barrel it works well with ramshot tac behind 125 150 and 165 gr projectiles. I went to tac because it’s a fast (yet clean) burning powder which is ideal for short barrels.

 

[Strike]

Evening all,was wondering if anyone is shooting a 308 with an 18" barrel and what load data you got to work with it ?
I have tried vhit n140 with grains of powder ranging from 39 to 41 with a hornady eld 168 grain projectile, 5 shot groups 3 close and 2 way off.
Tried vhit n133 with grains ranging from 35 to 38 with the same horrnady projectile...seen some improvement with groups but nothing to write home about..
Any suggestions would be i

Twist rate is 1:8

1:8 twist 168grn eldm, bullet length 2.272, approx speed 2500fps.
This bullet weight and length will likley be unstable. 1:8 twist is too fast for 168grn.
Look at 220grn ish.

Twist rate is 1:8

Twist rate is 1:8

 

[Steven mclean]

1:8 twist 168grn eldm, bullet length 2.272, approx speed 2500fps.
This bullet weight and length will likley be unstable. 1:8 twist is too fast for 168grn.
Look at 220grn ish.

Yeah I have subsequently found out that the barrel was made for subsonic rounds ..now starts a new journey to reloading subsonic..it should be fun ..loaded up some to try out so will keep everyone posted with the results

 

[Strike]

Yeah I have subsequently found out that the barrel was made for subsonic rounds ..now starts a new journey to reloading subsonic..it should be fun ..loaded up some to try out so will keep everyone posted with the results

I experimented with sub sonic in my .308 20in barrel 1:10 twist. I posted the results I got. If you search. 308 sub sonic, you may find it useful.