.308 - Sierra 169 SMK loads

[Sardious]

A few years ago, Sierra came out with the 169 SMK in an attempt to iron out the short comings of the 168 SMK especially past 800 yards.

Has anyone worked up any loads for .308 with the 169's that they have shot past 800 yards? Do share.

My pet load for .308 WIN 168 SMK's (300-600 yard) in a bolt rig is: 45.0 grn of VARGET, Lapua Brass, Wolf LR primers. 2.800" or mag length.
Barrel: 1-11 twist Bartlein (30") with 95 Palma chamber.

I hope to use the 169's with a similar load and have it print well at 1K. -S

 

[simonp]

I’ve honestly never tried the 169’s, seemed like a solution to a nonexistent problem to me.
600 yards - 168’s
600 plus parts - 175’s

What’s the appeal of 169?

 

[JMGlasgow]

Federal brass, 43.1gr IMR4064, 2.85 COAL. With a DA of 6200ft I'm dialing 8.3mrad at 1000. Muzzle velocity is around 2750 from a 26" Criterion barrel.

 

[supercorndogs]

I’ve honestly never tried the 169’s, seemed like a solution to a nonexistent problem to me.
600 yards - 168’s
600 plus parts - 175’s

What’s the appeal of 169?

Same BC as the 175, so you can push the same BC bullet faster with less recoil.

 

[nn8734]

I’ve honestly never tried the 169’s, seemed like a solution to a nonexistent problem to me.
600 yards - 168’s
600 plus parts - 175’s

What’s the appeal of 169?

A few years ago, Sierra came out with the 169 SMK in an attempt to iron out the short comings of the 168 SMK especially past 800 yards.

Has anyone worked up any loads for .308 with the 169's that they have shot past 800 yards? Do share.

My pet load for .308 WIN 168 SMK's (300-600 yard) in a bolt rig is: 45.0 grn of VARGET, Lapua Brass, Wolf LR primers. 2.800" or mag length.
Barrel: 1-11 twist Bartlein (30") with 95 Palma chamber.

I hope to use the 169's with a similar load and have it print well at 1K. -S

The 169 has a G1 BC of .527 while the 175 has a BC of .505...similar but the 169 is noticably flatter and handles wind better esp beyond 500m.

I shoot my 308s regularly beyond 800m with the 169 and it's a better performer than the 175 overall.

Load work up is the same as the 175 however you will be seating it a bit longer (or deeper if mag-limited) into the case. You shouldnt habe any issues with either standard dbms or adl/internal magazines. Use any powder that you have for the 175s with the 169sm(IMR4064, Varget, Reloader15, 8208, AA2520, etc).

Here's a direct comparison I did between them a while back:

Mk11 Mod 0 Load Development and Testing - 169g Sierra Matchking

Had a chance to load up and test the new 169SMK in my Mk 11 Mod 0. Overall, I like the 308 but found the 175SMK to be lacking consistency beyond 700m (that’s after I factor me as an average shooter out of the equation). I developed a few quick loads using Sierra’s new 169 Matchking and tested...

www.snipershide.com

I no longer shoot the 175s, have switched over to the 169s.

 

[Sardious]

Good write up!

 

[straightshooter1]

The 169 has a G1 BC of .527 while the 175 has a BC of .505...similar but the 169 is noticably flatter and handles wind better esp beyond 500m.

I shoot my 308s regularly beyond 800m with the 169 and it's a better performer than the 175 overall.

Load work up is the same as the 175 however you will be seating it a bit longer (or deeper if mag-limited) into the case. You shouldnt habe any issues with either standard dbms or adl/internal magazines. Use any powder that you have for the 175s with the 169sm(IMR4064, Varget, Reloader15, 8208, AA2520, etc).

Here's a direct comparison I did between them a while back:

Mk11 Mod 0 Load Development and Testing - 169g Sierra Matchking

Had a chance to load up and test the new 169SMK in my Mk 11 Mod 0. Overall, I like the 308 but found the 175SMK to be lacking consistency beyond 700m (that’s after I factor me as an average shooter out of the equation). I developed a few quick loads using Sierra’s new 169 Matchking and tested...

www.snipershide.com

I no longer shoot the 175s, have switched over to the 169s.

Likewise, I no longer shoot the 175's and the 169's are my preferred round. Last year I tried some of the new 177 SMK's as they're a new design like the 169's. The 177's also performed extremely well for me with their published BC of .545. As well as the 177's performed for me, I'll be sticking with the 169's for the most part, but am keeping a little supply of the 177's just for special occasions.

You might try the 177's an see what you think???

 

[nn8734]

Likewise, I no longer shoot the 175's and the 169's are my preferred round. Last year I tried some of the new 177 SMK's as they're a new design like the 169's. The 177's also performed extremely well for me with their published BC of .545. As well as the 177's performed for me, I'll be sticking with the 169's for the most part, but am keeping a little supply of the 177's just for special occasions.

You might try the 177's an see what you think???

Oh I have thought about it and, to be honest, fear I may like the 77smk too much, given how many 169s i have accumulated, haha...I may order a box and give them a whirl in my M40A5...I also have a boat load of 185 Jugs that Ive been meaning to mess with as well...

 

[AR-180]

I like 44.4 of Varget with a 169. I use Lapua and a CCI 200 or BR2.

 

[straightshooter1]

I like 44.4 of Varget with a 169. I use Lapua and a CCI 200 or BR2.

. . . at what COAL?

 

[Bobby Ball]

I had a really hard time trying to get them to shoot in my gun. I've run mostly 185 juggs, and 200's. I was really hoping to make them work, but it wasn't meant to be.
Having said that...
I had to pull the barrel shortly after due to finding it had an obscene amount of freebore, and my guess is that the only reason the 185's and 200's were shooting "ok" was the longer length of the bullet. I would give them another shot if I was going back with another 308 barrel, but I'm working on a pretty large rebirth in a different caliber.
I wouldn't discourage anyone from trying them. More than anything I'm bummed I couldn't make them work.

 

[baddog652]

I like 44.4 of Varget with a 169. I use Lapua and a CCI 200 or BR2.

How much jump do these 169's like? I tried 42.5 to 45.5 in .5 increments at .010 off and the results were terrible. I used BR2's, once fired Lapua and Varget. Rifle is a Savage 10FLCP-SR, 24" barrel and 1-10.

 

[AirgunnerPCP]

How much jump do these 169's like? I tried 42.5 to 45.5 in .5 increments at .010 off and the results were terrible. I used BR2's, once fired Lapua and Varget. Rifle is a Savage 10FLCP-SR, 24" barrel and 1-10.

I shoot mine .040 off the lands. Honestly it was a bit of an arbitrary seating depth. I have about 1500 more rounds on the barrel since I've taken than measurement so I dunno what it is now.

 

[baddog652]

I shoot mine .040 off the lands. Honestly it was a bit of an arbitrary seating depth. I have about 1500 more rounds on the barrel since I've taken than measurement so I dunno what it is now.

Thanks! I loaded up 5 each with 43.5 Varget with .005 to .025 but after your reply I may do some .030 to .040. Almost every rifle I have (223 bolt, 6.5CM and 270 Win) prefer .005. Thanks again and if you don't mind I'll let you know the results.

 

[straightshooter1]

How much jump do these 169's like? I tried 42.5 to 45.5 in .5 increments at .010 off and the results were terrible. I used BR2's, once fired Lapua and Varget. Rifle is a Savage 10FLCP-SR, 24" barrel and 1-10.

Keep in mind that at particular jump can mean a very different seating depth due to differences in chamber freeboards and throat erosion. .010" off your lands could mean loading .010" of my lands could mean my seating depth (how far the base of the bullet is into the case) is .035" further out. . . meaning more case capacity for me and less pressure.

How far you are off the lands is a good reference just for your gun as a starting point, knowing where the touching point on the lands is. Then you go from there.

When comparing how someone is loading their particular cartridge as to how it'll fit in your chamber, it's best to state a COAL. From there, I (we) can get a better idea how your cartridge is configured and compares to our chamber using our own comparator insert (comparator inserts having variations and some that are very substantial).

With that in mind, I load my 169 SMK's to a COAL of 2.964, which is currently .021" off my lands (the throat erosion has been .027" after 2200 rounds fired). I haven't changed my seating depth over that time even though the bullet's BTO's have differed from one lot to another. That particular seating depth has been working real well for me and I won't change it until I start to see issues with it on target. Though I originally had my load .010 off the lands with a COAL of 2.964, there's been a little difference is the bullet's BTO's, which is why those numbers (the erosion and current off the lands) don't seem to add up.

I load 41.1 grs of AR-Comp into Lapua Palma cases with .0015 neck tension and necks are annealed after every firing. Primers are CCI400's and CCI450's, which give me velocities ~ 2710 fps with SD's ~6 fps and ES's in the low 20's with 20-30 chronoed shots in a series. On paper, groups are in the .2 to low .4. . . MOA's mostly the latter. Oh . . . this is out of an Gen 2 RPR with a 26" Krieger heavy barrel.

 

[baddog652]

At .010 I'm at 2.925 COAL.

 

[straightshooter1]

At .010 I'm at 2.925 COAL.

So you see, when I was .010 off my lands, my COAL was 2.964 . . . a .039" difference from yours. That a huge difference in seating depth. Seating depth is much, much more important the how far you are off the lands.

 

[baddog652]

So you see, when I was .010 off my lands, my COAL was 2.964 . . . a .039" difference from yours. That a huge difference in seating depth. Seating depth is much, much more important the how far you are off the lands

I got the throat reamed on 2 of my 223's which allowed me to lengthen the round so I may to either give this Savage some help or rebarrel it. Thanks again.

 

[Zane_C]

Thanks! I loaded up 5 each with 43.5 Varget with .005 to .025 but after your reply I may do some .030 to .040. Almost every rifle I have (223 bolt, 6.5CM and 270 Win) prefer .005. Thanks again and if you don't mind I'll let you know the results.

I have shot several boxes of the 169’s in two different rifles and have found .050 or further just works. Even going through load development on a new barrel with varying charge weight that depth just shoots. I’m running alpha brass federal 210M primers with Varget. Barrel is a 26” proof.

 

[baddog652]

I have shot several boxes of the 169’s in two different rifles and have found .050 or further just works. Even going through load development on a new barrel with varying charge weight that depth just shoots. I’m running alpha brass federal 210M primers with Varget. Barrel is a 26” proof.

Thank you. I have some loads from .010 to .050 waiting to shoot but my range is flooded. Now we have TS Milton doe on Thursday.

 

[straightshooter1]

I have shot several boxes of the 169’s in two different rifles and have found .050 or further just works. Even going through load development on a new barrel with varying charge weight that depth just shoots. I’m running alpha brass federal 210M primers with Varget. Barrel is a 26” proof.

What COAL does that .050 represent?

 

[Zane_C]

What COAL does that .050 represent?

I would have to double check but I believe 2.860 and a 2.110 BTO

 

[straightshooter1]

I would have to double check but I believe 2.860 and a 2.110 BTO

For my Krieger barrel's chamber, that .050 off the lands would translate to a very different COAL for me. I load my 169 SMK cartridges to a COAL of 2.957" which is .035" off my lands, using my Sinclair comparator, that's a CBTO of 2.235". If I load to .050 off my lands, my COAL would be 2.942". . . an .082" difference in seating depth.

Apparently, you're chamber's freebore is much shorter than mine.

 

[Zane_C]

For my Krieger barrel's chamber, that .050 off the lands would translate to a very different COAL for me. I load my 169 SMK cartridges to a COAL of 2.957" which is .035" off my lands, using my Sinclair comparator, that's a CBTO of 2.235". If I load to .050 off my lands, my COAL would be 2.942". . . an .082" difference in seating depth.

Apparently, your chamber's freebore is much shorter than mine.

I thought so too when I first started measuring my chamber. I used a Hornady OAL gauge which probably isn’t the best but I know I’m close enough.

 

[straightshooter1]

I thought so too when I first started measuring my chamber. I used a Hornady OAL gauge which probably isn’t the best but I know I’m close enough.

That Hornady comparator of yours is just fine as differences between comparators really doesn't matter as long as you're using the same one when comparing measurements for your own cartridges and chambers. I also have a Hornaday comparator, but I just don't use is any longer as I just like the Sinclair better (not that it's really "better" in any significant way). The difference between these two comparators of mine is .067" in BTO measurements.

 

[Zane_C]

That Hornady comparator of yours is just fine as differences between comparators really doesn't matter as long as you're using the same one when comparing measurements for your own cartridges and chambers. I also have a Hornaday comparator, but I just don't use is any longer as I just like the Sinclair better (not that it's really "better" in any significant way). The difference between these two comparators of mine is .067" in BTO measurements.

That is a crazy difference. The Hornady has worked for me so I just have stayed with it. I couldn’t find much online about proofs prefit chamber dimensions. Seems to be almost identical to my other gun which is a bartlein chambered by southern precision rifles. Guess I’m just into short chambers The 169’s have behaved almost the same in both rifles. Seating depth doesn’t seem to have a major impact from what little testing on seating depth I have done. I have tested from .010 back and didn’t see anything significant.

 

[straightshooter1]

That is a crazy difference. The Hornady has worked for me so I just have stayed with it. I couldn’t find much online about proofs prefit chamber dimensions. Seems to be almost identical to my other gun which is a bartlein chambered by southern precision rifles. Guess I’m just into short chambers The 169’s have behaved almost the same in both rifles. Seating depth doesn’t seem to have a major impact from what little testing on seating depth I have done. I have tested from .010 back and didn’t see anything significant.

Those differences in comparators and chamber sizes is why I tend to be a little "preachy" about not stating how far one is off the lands, but what the cartridge COAL is. Though there's very often a difference in a bullet's OAL within a lot and from lot to lot, the COAL gives me a better way of determining just how someone else's cartridge configuration might fit into my chamber. . . or not (as in my post #23 above). Like, I load my to . 035 off the lands for my gun now and that's a COAL of 2.957" where you wouldn't be able to even close the bolt of your gun on my 2.957" cartridge.

 

[Dog Doc]

I think this thread is where I read about the 169gr and got 200. Just messing around and .030 off the lands of my GAP Crusader, this bullet makes by 308 shoot like 6mm and 6.5 creed. I am absolutely shocked at how impressive it is. I had essentially just had this rifle in the back of the safe and was board thinking I would play around with it. With a load not even developed I was able to clean our range KYL and have only done that once before with the 6GT.