I couldn’t figure out where to put this…

[CS Boomis]

I’ve posted up this fella before. Thought this would tick several boxes for some of y’all.

 

[adamsredlines]

So those of you who are more into long range....

Did the 169 TMK take off, or is most everybody still using 168s, or moving to a different caliber? Seems they made a splash when they were released, but you don't see/hear much of anything about them???

 

[JEVapa]

175SMK for a 308. 168gr is so 40 years ago.

 

[adamsredlines]

I'm curious on the 169s though....better BC than both 168 and 175, pretty similar to the 190s, without adding the weight of going to 175/190. That seems win/win.

 

[JEVapa]

You’d have to do a load and plug it into a calculator to see anything. I have have other TMK and TGK and I don’t like them much because they’re shaped a little differently, especially the TGK.
One issue with 168s was they didn’t have very good terminal performance…that whole KE=1/2MV2 thing.
I’ll run a comparison through my AB stuff and see.

 

[JEVapa]

Their performance is about the same. There is no 169TMK I could find, just a 169SMK so I compared it with a 175SMK. There is a 168TMK as is a 175TMK. Unless you’re an experimental load development hobbyist, I don’t think trying to make a 168/169gr match bullet outperform 175gr GMM/AB39/M118LR is worth the primers or powder. I see no benefit, at least for me. I’d move to a high performance Berger if you wanna do that kind of thing.

 

[Beautiful Mulberry]

What twist do you have to run the 175smk?

 

[rockchalk06]

What twist do you have to run the 175smk?

I've ran them in a 1:12 with no issues out to 550. Now, all of my .308's are 1:10

 

[JEVapa]

All my guns are 1:10. I had a 1:8 and I gave it to a buddy. It's way better...I'm gonna swap a couple to 1:8 at some point. I'm pretty sure the 308 barrel on my Siete is 1:8.

 

[Beautiful Mulberry]

With the 1/8 what’s the heaviest bullet you run?
What velocity and distance are you getting?
What group size do y’all average?

 

[KurtM]

I'm not really a long range guy. To me 308 runs out of gas around 800 for effectiveness no matter what bullets I'm happy with 168s. Now I do.go heavier in 300 WM.

 

[adamsredlines]

That's supposed to be the reason for the 169s, keep supersonic past 1000. Anywho, wasn't the point of the video, just noticed that's what he said he was shooting through it.

 

[JCann]

I believe the guy in the video had 10 shot 50% hit on a full size IPSC at 1,200 yards with the 169gr in a different video. That’s dang good for a 308 DMR. Especially when it was roughly 1.5 MOA at 100 yards when he zeroed it.