105gr Hybrid vs 115 DTAC

[Hengehold]

The balistic software suggests that the 105gr hybrid has slightly better wind drift performance at 1000yds than a 115 DTAC. I have shot the 6XC with both 105gr and 115gr bullets and they both performed well. I am curious why someone would choose to go with the 115gr bullet which is limiting your bullet options when the 105 hybrid has better ballistics.

Another bonus of the shorter throat is that there are more bullet choices in the 105 family to choose from if your barrel does not like the hybrid. The 115gr family is much more limited.

Someone sell me on the advantage of using a 115gr rather than a 105 gr bullet.

Thanks,

-Trevor

 

[jaygorski]

The balistic software suggests that the 105gr hybrid has slightly better wind drift performance at 1000yds than a 115 DTAC. I have shot the 6XC with both 105gr and 115gr bullets and they both performed well. I am curious why someone would choose to go with the 115gr bullet which is limiting your bullet options when the 105 hybrid has better ballistics.

Another bonus of the shorter throat is that there are more bullet choices in the 105 family to choose from if your barrel does not like the hybrid. The 115gr family is much more limited.

Someone sell me on the advantage of using a 115gr rather than a 105 gr bullet.

Thanks,

-Trevor

The 110MK has almost identical BC to the new DTAC, one more option. DTAC and Hybrid BCs are worlds apart, .547 vs .620.

 

[jaygorski]

The balistic software suggests that the 105gr hybrid has slightly better wind drift performance at 1000yds than a 115 DTAC. I have shot the 6XC with both 105gr and 115gr bullets and they both performed well. I am curious why someone would choose to go with the 115gr bullet which is limiting your bullet options when the 105 hybrid has better ballistics.

Another bonus of the shorter throat is that there are more bullet choices in the 105 family to choose from if your barrel does not like the hybrid. The 115gr family is much more limited.

Someone sell me on the advantage of using a 115gr rather than a 105 gr bullet.

Thanks,

-Trevor

My calculations gives the DTAC the edge by 3.5" out to 1K, and that's with the Hybrid coming down the tube 60fps faster.

 

[Hengehold]

The 110MK has almost identical BC to the new DTAC, one more option. DTAC and Hybrid BCs are worlds apart, .547 vs .620.

jaygorski,

Thank you for the response. I am using the tested BCs that are found in the Applied Ballistics calculator. I consider Bryan Litz to be THE authority on BC ratings rather than AN authority on the subject because he tests the BCs rather than estimating them. All other published BCs are little more than marketing in my opinion. I am also using the ballistics calculator on the Berger bullets website.

With that said,
105 Hybrid = G7 .275, MV-3025 fps, Drift-7.0 in per 1mph
115 DTAC = G7 .276, MV-2960 fps, Drift-7.2 in per 1mph

The velocities I listed above were the nodes from my last few barrels.

-T

 

[swd]

I would suggest shooing the DTAC's for yourself. You might be surprised.

 

[Milo 2.0]

jaygorski,

Thank you for the response. I am using the tested BCs that are found in the Applied Ballistics calculator. I consider Bryan Litz to be THE authority on BC ratings rather than AN authority on the subject because he tests the BCs rather than estimating them. All other published BCs are little more than marketing in my opinion. I am also using the ballistics calculator on the Berger bullets website.

With that said,
105 Hybrid = G7 .275, MV-3025 fps, Drift-7.0 in per 1mph
115 DTAC = G7 .276, MV-2960 fps, Drift-7.2 in per 1mph

The velocities I listed above were the nodes from my last few barrels.

-T

I think what you are quoting as far as numbers are quite outdated, do some more research.

 

[spclark]

Before Bryan Litz appeared on the scene, German Salazar expressed much the same sentiment Trevor.

He felt the 105 Berger (at the time their VLD was the only one) was fully up to competing with 6.5x284 or his favorite 30-06.

Didn't change much either when Tubb's 115 DTAC appeared.

He'd quit shooting (and soon shut down his blog, much to our continuing disappointment) about the time Berger announced their Hybrid line, one of the first being the 105.

I was among those who got to do final testing before retail release & found them every bit as good a performer as the Target VLD version. Up against a better shooter with his 6.5x284 @ 1,000 yards I proved to myself what German also believed.

Perhaps when pushed to higher velocities than a 6XC is safely capable of the 115's might have a slight advantage? I don't know....

John Whidden's 243 has proven very capable using 105's though whether the Hybrid design of late I don't know. He's a fan of their 105VLD!

 

[Hengehold]

I think what you are quoting as far as numbers are quite outdated, do some more research.

Are there other TESTED BC numbers being published somewhere? If so, please point me in the right direction. Thanks.
-T

 

[Hengehold]

Before Bryan Litz appeared on the scene, German Salazar expressed much the same sentiment Trevor.

Thanks Steve, I guess I will consider myself to be in good company on this topic.

-T

 

[Hengehold]

The 110MK has almost identical BC to the new DTAC, one more option. DTAC and Hybrid BCs are worlds apart, .547 vs .620.

I have not used the 110 SMK yet. Does that require a throat for the 115gr class or the shorter throat for the 105gr class?

-T

 

[Rob01]

All other published BCs are little more than marketing in my opinion. I am also using the ballistics calculator on the Berger bullets website.

-T

Not of the two bullets you are speaking of but the Hornady ELD BCs are actual Doppler tested numbers and not marketing. Doppler is the best way to test and even Litz states that.

www.hornady.com/bc

 

[jaygorski]

I have not used the 110 SMK yet. Does that require a throat for the 115gr class or the shorter throat for the 105gr class?

-T

Yes, in the .160" FB range, just loaded some up the other day. http://i.imgur.com/yw8AwWB.jpg

 

[jaygorski]

jaygorski,

Thank you for the response. I am using the tested BCs that are found in the Applied Ballistics calculator. I consider Bryan Litz to be THE authority on BC ratings rather than AN authority on the subject because he tests the BCs rather than estimating them. All other published BCs are little more than marketing in my opinion. I am also using the ballistics calculator on the Berger bullets website.

With that said,
105 Hybrid = G7 .275, MV-3025 fps, Drift-7.0 in per 1mph
115 DTAC = G7 .276, MV-2960 fps, Drift-7.2 in per 1mph

The velocities I listed above were the nodes from my last few barrels.

-T

Yea, Litz is using the old DTAC, new one is much better. In the .310-.320 G7 range.

 

[swd]

Yes, in the .160" FB range, just loaded some up the other day. http://i.imgur.com/yw8AwWB.jpg

No the 110SMK is has a MUCH shorter bearing surface than the DTAC/RBT. I forget the exact number but it's something like .050"+ shorter. It has .010" less bearing surface than the 107SMK. The 110 definitely needs a 7"-7.5" twist vs 8" for the DTAC.

I can tell you from my shooting experience the advertised BC of the DTAC is spot on and if anything the 110SMK is conservative and is probably higher than the DTAC.
I've put about 500 DTAC's and 800 110SMK's through my current barrel. Both bullets like to run the same speed in this barrel, 3080 fps in a 6x47Imp.

 

[jaygorski]

No the 110SMK is has a MUCH shorter bearing surface than the DTAC/RBT. I forget the exact number but it's something like .050"+ shorter. It has .010" less bearing surface than the 107SMK. The 110 definitely needs a 7"-7.5" twist vs 8" for the DTAC.

I can tell you from my shooting experience the advertised BC of the DTAC is spot on and if anything the 110SMK is conservative and is probably higher than the DTAC.
I've put about 500 DTAC's and 800 110SMK's through my current barrel. Both bullets like to run the same speed in this barrel, 3080 fps.

Base to ogive with the 110MK touching the lands is 2.095", the NEW DTAC is 2.205", either way you look at it they both need a longer freebore, the DTAC probably a bit more, like in the .180" range, the 110s definitely DO NOT need a 7 or 7.5" twist, my 8 twist does a fine job. OAL for the 110s are 2.783" New DTACs 2.786", if both were seated to touch the lands..

 

[swd]

Here's some bearing surface measurements on what I could find on my bench. They are approximate to within about .005"

.320" 105 Berger VLD Hunting
.345" 110SMK
.360" 107 SMK old style
.365" 105 Berger Hybrid
.400" 115 DTAC old style
.420" 115 DTAC/RBT

Glad to hear 110's work in your 8". They don't work in every 8" twist. If your ordering a barrel and 110's are on your short list a 7.5" is a safer bet. If you already have an 8" give them a try.

 

[jaygorski]

Here's some bearing surface measurements on what I could find on my bench. They are approximate to within about .005"

.320" 105 Berger VLD Hunting
.345" 110SMK
.360" 107 SMK old style
.365" 105 Berger Hybrid
.400" 115 DTAC old style
.420" 115 DTAC/RBT

Glad to hear 110's work in your 8". They don't work in every 8" twist. If your ordering a barrel and 110's are on your short list a 7.5" is a safer bet. If you already have an 8" give them a try.

One of the first couple shots at 200yds with the 110s out of my 6mmcreed, waiting for weather to get nicer so I can do some verifying tests. http://i.imgur.com/maA7A4t.jpg

 

[swd]

That'll work! What kind of speed are are you getting?

 

[jaygorski]

That'll work! What kind of speed are are you getting?

Says on the target, 3012. Getting 2979 with the new DTACs. 4 shots 200yds

 

[germanlongbow]

I loved the 105 hybrids pushed hard in my 243 AI. Burned the first barrel out in 1200 rounds. Switched to a 1x7.5 and 115 dtac's a tad slower but barrel has 1500 rounds and still accurate. I think both bullets are great, for me it came down to barrel life. Changing out multiple barrels each year was getting expensive, especially when shooting several different rifles.