Sierra 150 grain 6.5 Matchking

[sremmell]

Matrix Ballistics produces a 162 grain VLD with an estimated BC of approx. .750 according to shooting results.

I couldn’t find much on the 160 but looks like the 160 comes out to about .310 g7

 

[wboggs]

You should have a good safety margin. Some are even shooting 8 t and bullet stabilizes.
I.am also waiting on a heavier 6.5
bullet but there is a limited market and not many barrels can handle.one.
Probably just economics.

 

[FrankG]

In 6.5mm we've done twist rates as fast as 1-6.

Heck in .30cal. we've done twist rates as fast as 1-1.5! Even made a 1-1 twist barrel but we we're wiping out half of the land width. Couldn't put enough clearance on the fast side of the tool but the barrel came out fine.

Faster than 1-6 twist will cost you extra money! LOL!

 

[wboggs]

I went ahead and bought a Bartlein 7 twist 5r. After looking at stability numbers I would be 1.51 on the colder days here and one of the place I shoot is right at sea level. This also give me options if anyone comes out with any heavier bullets that need a tighter twist

Heavier 6.5 bullets are probably a matter of economics. There is a limited market and a lot of barrels won't shoot them. In my opinion, the 180 class 7mm's have become very popular for the reason that most can shoot them and they are very accurate. Recoil is very manageable

 

[Steveb]

I been shooting the Matrix 162's from my 1 in 7 1/2" in a 6.5 x 284 and they have proven to be very stable and have a very wide accuracy node. They seem to track with the .750 BC on the app's.

 

[sremmell]

I been shooting the Matrix 162's from my 1 in 7 1/2" in a 6.5 x 284 and they have proven to be very stable and have a very wide accuracy node. They seem to track with the .750 BC on the app's.

That will be nice if it’s true. I’ll pick some up when it comes together. Waiting on my manners stock now

 

[whatwind?]

Go back and read some of my earlier posts.

In 6.5CM my barrel is a 1-6.75 twist. Honest 2700fps out of a 23” barrel. Bullet rpm is 288K.

I’ve had no failures and have shot 150smk, 147 Hornady’s and box 140amax ammo.

My 6.5PRC F class barrel is a 7.25 twist. Will be shooting it shortly once weather breaks more.

Later, Frank

@FrankG any results on this set up?

 

[1shot]

My 6.5 GWI in a 7.5 twist stabilizes them just fine at 2,990 fps at 1,100 ASL.

Lloyd

 

[SPQR70AD]

Barrel makers have to love fast twist barrels and big powder charges