6 x 47 Lapua - 110 SMK

[xswanted]

Hi guys,

I’ve been playing with a 6x47 Lapua and the 110s.

I’ve shot some pretty good groups thus far and am getting the velocity I wanted.

I’m looking for your loads to compare to what I’m at.

I’m using the following:

Lapua Brass
Sierra 110
Broughton 5C Barrel
CCI 450
H4350
2.760 OAL

Let me know, specifically about H4350 what is being used both accuracy nodes and top end in your rifle if you’ve found it.

I’m m curious to see where I’m sitting.

Thank you!

 

[dstoenner]

I have not done anything with the 110 SMK besides do a preliminary test for what might be the top load of H4350. I went to 38.5 with no signs of excessive pressure. What stopped me was when I was considering the seating depth testing I realized that I was already seated out as far as I can go. My barrel is a McGowen and the freebore as chambered is .110. I have a spreadsheet I have created for all of the bullets I would use in this chamber where I plug in bullet dimensions and it tells me what the min and max loaded lengths are. Max is defined as keeping 1 caliber of bullet bearing surface in the neck. For the 110 that value is 2.771. My 0 rounds fired chamber was 2.779 to the lands for that bullet. At 500 rounds now the length is 2.800 At 1000 it was 2.815. Since I was frozen from chasing the lands I didn't consider it a good alternative in this barrel. Maybe my next one but I doubt it because its freebore is going to be .100.

The Berger Hybrid is a good fit. I also bought some 115 DTAC RBTs. The DTACs even seems to be a better fit as the barrel wears.

My 105 Hybrid load is 39.0 at 2.680 COAL. I never saw any pressure signs at all up to 39.6 where I stopped. I still have another .015 of throat erosion before the 105's will just jump longer. Right now that are jumping .025.

The DTACs load is 39.2 H4350 loaded at 2.660 where current distance to lands is 2.695. The DTAC can go out to 2.735 so I have a LOT of throat erosion I can chase with these. Hence why I think they are a great solution.

The 110 SMK seems to have a VERY long nose which is its issue where both the 105 Hybrid and the 115 DTAC both have a more balanced nose to bearing surface. Some thoughts to consider.

HTH

David

 

[xswanted]

I have not done anything with the 110 SMK besides do a preliminary test for what might be the top load of H4350. I went to 38.5 with no signs of excessive pressure. What stopped me was when I was considering the seating depth testing I realized that I was already seated out as far as I can go. My barrel is a McGowen and the freebore as chambered is .110. I have a spreadsheet I have created for all of the bullets I would use in this chamber where I plug in bullet dimensions and it tells me what the min and max loaded lengths are. Max is defined as keeping 1 caliber of bullet bearing surface in the neck. For the 110 that value is 2.771. My 0 rounds fired chamber was 2.779 to the lands for that bullet. At 500 rounds now the length is 2.800 At 1000 it was 2.815. Since I was frozen from chasing the lands I didn't consider it a good alternative in this barrel. Maybe my next one but I doubt it because its freebore is going to be .100.

The Berger Hybrid is a good fit. I also bought some 115 DTAC RBTs. The DTACs even seems to be a better fit as the barrel wears.

My 105 Hybrid load is 39.0 at 2.680 COAL. I never saw any pressure signs at all up to 39.6 where I stopped. I still have another .015 of throat erosion before the 105's will just jump longer. Right now that are jumping .025.

The DTACs load is 39.2 H4350 loaded at 2.660 where current distance to lands is 2.695. The DTAC can go out to 2.735 so I have a LOT of throat erosion I can chase with these. Hence why I think they are a great solution.

The 110 SMK seems to have a VERY long nose which is its issue where both the 105 Hybrid and the 115 DTAC both have a more balanced nose to bearing surface. Some thoughts to consider.

HTH

David

Lots of good stuff there.

I measured and re measured mine and it looks like a 110 SMK loaded to touch the rifling is 2.845. I forget what the reamer freebore is but it was a reamer Intended for this bullet.

So my 2.760 OAL was jumping a long long ways.

Accuracy was good, but I feel like I’m up quite in powder charge.

I may try some 105s or 108s.

Thank you for all the info!

 

[dstoenner]

Lots of good stuff there.

I measured and re measured mine and it looks like a 110 SMK loaded to touch the rifling is 2.845. I forget what the reamer freebore is but it was a reamer Intended for this bullet.

So my 2.760 OAL was jumping a long long ways.

Accuracy was good, but I feel like I’m up quite in powder charge.

I may try some 105s or 108s.

Thank you for all the info!

For sure you were jumping a country mile (in barrel terms ). Maybe I will give a long jump a try and if it works I might try it again.

For me the Berger Hybrids have shot lights out in my 260 for 1000 yard F-Class and in my 6BR for benchrest shooting. They are hard to beat. For my setup the 115 shots inside what I was shooting with my 260 using 140's. For me the 6x47 is my new F-Class caliber in an attempt to just reduce the amount of recoil my body is absorbing. 70+ rounds of 260 in a day was wearing me out. This was my attempt to stay in the game. So far we have only had one match which was a 3X 600 and we had winds 12-15 MPH and I fared well enough with the 105 Berger doing 2970 fps. The 115 load is running 2950. We got rained out again this weekend so I haven't had a chance to try the 115's at 1000. Hopefully in June at the next 1000 match. This has been a bad year 3 out of 4 matches rained out.

I just looked at my ballistic program and the 115 and the 110 both would have 5.9 MOA for a full 10 MPH wind in my setup. Pretty much a wash.

David

 

[xswanted]

Well not a lot of responses so here’s what I settled with.

The gun I have would shoot really good then it wouldn’t. I went through a lot of tests to see if it was me, stock, barrel etc....you name it.

It boiled down to my dad, an old benchrest shooter, telling me he thought the necks were too tight on my brass. I believe I ended up with thick necks after necking down the 6.5 brass. So, I decided to neck turn 10 cases to see what happened.

I also brought my seating depth way out.

I lowered my powder charge significantly and ended up with three really good groups.

6x47 Lapua
.148 freebore/.272 neck
Lapua 6.5x47 brass necked down
38.0 grains of H4350
CCI 450 primers
110 SMK
.020 jump
5 shots 100 yards.

The low shot in the picture was the last and it didn’t feel smooth, so I’m claiming it as the shooter and nothing the gun did. The other two groups I shot with this load were similar.

On another note this is the first wildcat I’ve necked down that ended up with tight brass in the neck.

But it looks like it’s on the right track!

 

[swd]

Well not a lot of responses so here’s what I settled with.

The gun I have would shoot really good then it wouldn’t. I went through a lot of tests to see if it was me, stock, barrel etc....you name it.

It boiled down to my dad, an old benchrest shooter, telling me he thought the necks were too tight on my brass. I believe I ended up with thick necks after necking down the 6.5 brass. So, I decided to neck turn 10 cases to see what happened.

I also brought my seating depth way out.

I lowered my powder charge significantly and ended up with three really good groups.

6x47 Lapua
.148 freebore/.272 neck
Lapua 6.5x47 brass necked down
38.0 grains of H4350
CCI 450 primers
110 SMK
.020 jump
5 shots 100 yards.

What kind of speed is it making?
The low shot in the picture was the last and it didn’t feel smooth, so I’m claiming it as the shooter and nothing the gun did. The other two groups I shot with this load were similar.

On another note this is the first wildcat I’ve necked down that ended up with tight brass in the neck.

But it looks like it’s on the right track!

What kind of speed is it making?

 

[dstoenner]

What kind of speed is it making?

And what is your new OAL to tip?

As a note i am running 115 dtacs at 39.2 H4350 with a muzzle velocity of 2975. OAL is 2.660 for a .015 jump

David

 

[xswanted]

What kind of speed is it making?

I knew I forgot something when I typed that. Must have been tired.

I ran my chart at 2962. Hit a spray paint can at 835 today in a 12-20mph 90 degree wind using that velocity. I believe I had a .307 G7 punched in there as well. 7 twist Broughton 5c Barrel.

Took 2 shots but the gun did it.

I don’t know that those 110s need to go any faster than that. They’re pretty slippery.

 

[xswanted]

And what is your new OAL to tip?

As a note i am running 115 dtacs at 39.2 H4350 with a muzzle velocity of 2975. OAL is 2.660 for a .015 jump

David

New OAL is now 2.820.

That gives me a .020 jump which was the sweet spot for 100 yards and all the way to 835 today.

That bullet seems finicky on seating depth so as the throat wears it’ll be interesting to see if I can stretch it another few thousandths to keep it there. Don’t have a lot of room to work with really. But I’ll cross that bridge when I get there.

 

[muleystalker]

Just curious if you were able to get to the next node? Im shooting the 110's in my Dasher faster than that with great results but I'm using RL-16 though. You deffinatly don't really need to go any faster, it looks like its shooting great. I was just curios, Im getting ready to build a new hunting rifle for Ca. which needs to shoot monolithic bullets/non lead. I just got a couple sample 6mm 100gr Badlands Mono bullets and I'm debating between a Dasher, 6x47L and 6 Creedmoor.

 

[Evan]

Just curious if you were able to get to the next node? Im shooting the 110's in my Dasher faster than that with great results but I'm using RL-16 though. You deffinatly don't really need to go any faster, it looks like its shooting great. I was just curios, Im getting ready to build a new hunting rifle for Ca. which needs to shoot monolithic bullets/non lead. I just got a couple sample 6mm 100gr Badlands Mono bullets and I'm debating between a Dasher, 6x47L and 6 Creedmoor.

Not that you asked, but I'd go Creedmoor for a hunting rifle. More capacity means you can go faster if you want, and if you ever forget your ammo, you can pop in to a nearby gun shop and find 6mm creedmoor on the shelf.

 

[xswanted]

Just curious if you were able to get to the next node? Im shooting the 110's in my Dasher faster than that with great results but I'm using RL-16 though. You deffinatly don't really need to go any faster, it looks like its shooting great. I was just curios, Im getting ready to build a new hunting rifle for Ca. which needs to shoot monolithic bullets/non lead. I just got a couple sample 6mm 100gr Badlands Mono bullets and I'm debating between a Dasher, 6x47L and 6 Creedmoor.

I ran the 110s up to 3080 I believe. That was max, bolt lifted hard and there was pronounced extractor marks.

I found an accuracy node at 3050 that was as hard as I’d want to push things with this rifle for a load that’d I’d use all the time.

I’ve ran 110s to 3150 from the 6 creed. 27 1/2” barrel with R23

I think the extra speed isn’t worth the wear and tear on brass with this particular bullet. It holds elevation well at 1000 and should last quite some time with the brass.

Pretty mild load. (6x47)

 

[PracticalTactical]

I was one of the early adopters of the 6x47 Lapua and received the rifle back from Dan Dowling in January of that year. It was either 2007 or 2008, cant recall for certain.

I remember having a heck of a time developing a decent load in that cold weather.

Problems with hang fires and wild velocity spreads of over 100 FPS even with magnum primers.

I was mostly using 38.0 gr 4350 powder and the Tubb 115 DTAC, but I tried lots of other powders too.

Anyway, 300 rounds later I spoke with David Tubbs about the problems I was having, several times actually. His advice was to form 6x47 cases using large primer brass such as 22-250, 243 or even 6XC.

So I did and never looked back. It was easiest with 6XC brass BTW.

The velocity was so consistent that I had to turn the chronograph off between shots just to be sure it read the shot because it kept coming up with the same number.

The barrel I was running was polygonal from Gary Schnieder and it would easily produce 1/8 MOA groups at 100 yards in light mirage. It was the most accurate rifle I ever had.

Barrel took a sudden turn for the worst at almost exactly 800 rounds.

The new Broughton barrel never shot quite that well.

 

[The boogalorian]

I am in the process of developing a load for my first try at a 6x47L.
I tried the 110's with H4350 and RL16. Was not satisfied with the results so I have moved onto Berger 115 vld's.
I will be looking forward to seeing what is said here.

 

[xswanted]

I am in the process of developing a load for my first try at a 6x47L.
I tried the 110's with H4350 and RL16. Was not satisfied with the results so I have moved onto Berger 115 vld's.
I will be looking forward to seeing what is said here.

Did they not shoot well or lack of speed? What dissatisfied you?

 

[The boogalorian]

Did they not shoot well or lack of speed? What dissatisfied you?

I did a ladder with H4350 first figuring that would be the best powder. I found a node at 40.0gn but the primers were showing inconsistencies in pressure. I continued to try adjusting the seating depth but was disappointed in the group sizes, so I switched powders to RL16. Once again I found a node around 40.0gn but the group sizes were nothing special.
I decided to give the Berger 115gn vlds a go and immediately saw a reduction in group size across the entire ladder test.
Going to continue with the 115's and RL16.

 

[xswanted]

I did a ladder with H4350 first figuring that would be the best powder. I found a node at 40.0gn but the primers were showing inconsistencies in pressure. I continued to try adjusting the seating depth but was disappointed in the group sizes, so I switched powders to RL16. Once again I found a node around 40.0gn but the group sizes were nothing special.
I decided to give the Berger 115gn vlds a go and immediately saw a reduction in group size across the entire ladder test.
Going to continue with the 115's and RL16.

That’s interesting. I’ve had a couple guys tell me the 110s wouldn’t shoot well then the 115 Berger would.

I have some 115 RDFs I may try but the 110 Sierra .020 off the lands really worked well in this rifle.

 

[The boogalorian]

That’s interesting. I’ve had a couple guys tell me the 110s wouldn’t shoot well then the 115 Berger would.

I have some 115 RDFs I may try but the 110 Sierra .020 off the lands really worked well in this rifle.

I have only been loading for 5-6 years now, so it could be something in my process. I was at 160 rounds and didn't feel like I was making any progress. I'd bet that with more work it would work just fine. I built the rifle specifically to shoot the 110's. It has a 1 in 7 Krieger barrel. Glad I tried the 115's. Was nervous cause I read a bit of opinions that the vld's were sensitive to seating depth.
But so far, so good.

 

[Fred B.]

Resurrecting this post to see if any one has tried the new Hornady 110 A-tip with RL16 in 6x47?

-Fred

 

[Ranger188]

I tried the 110's and couldn't get what I was looking for. Went to the old reliable 107's
and RL16, shoot's as small as I can. @3072fps 7.5 tw Rockcreek .236 bore