Need help with TUBB DTAC 6xc please

Jeffd

Online Training Member
Feb 3, 2011
987
186
43
61
#1
A friend gave me 50 rounds of the DTAC ammo in the picture and it is different from the ammo I have from Tubb from a couple of years ago. Can anyone tell me what type of bullet this is and the BC to use? Thanks
 

Attachments

Mordamer

Professional Know It All
May 11, 2010
712
193
43
Hooker, OK
#2
I believe David recently started including that groove near the tip of the bullet because it supposedly increases B.C. I would guess that is just one of his newer 115 RBT Dtac bullets. G7 BC of .305 should get you close.
 
Likes: Jeffd

Jeffd

Online Training Member
Feb 3, 2011
987
186
43
61
#3
I believe David recently started including that groove near the tip of the bullet because it supposedly increases B.C. I would guess that is just one of his newer 115 RBT Dtac bullets. G7 BC of .305 should get you close.
Thanks! I was shocked to see this type of bullet
 
Sep 16, 2009
4,642
576
113
#5
Suggest going to the source. David will be glad to share with you from my expirence.
Give him a call.
 
May 9, 2017
573
44
28
Beattyville Ky
#6
The 500 round box of BN coated I just got in last week have a slightly rebated tip but don't appear to have as pronouned as yours seem to be. Although yours kinda look like it just has the ring and not rebated on the tip? This is my first batch of DTACs though so not sure what is the norm
 
Likes: Jeffd
Apr 14, 2013
257
19
18
Oklahoma
#7
I believe David recently started including that groove near the tip of the bullet because it supposedly increases B.C. I would guess that is just one of his newer 115 RBT Dtac bullets. G7 BC of .305 should get you close.
Nose ring does not increase BC as much as it helps reduce the variation from bullet to bullet. Uncut DTACs actually have a higher BC than the cut ones. I have been shooting the nose ring bullets for close to a year now. They are not for sale yet as the tooling to cut these more efficiently is still in R&D.
 

Mordamer

Professional Know It All
May 11, 2010
712
193
43
Hooker, OK
#8
Thanks
Nose ring does not increase BC as much as it helps reduce the variation from bullet to bullet. Uncut DTACs actually have a higher BC than the cut ones. I have been shooting the nose ring bullets for close to a year now. They are not for sale yet as the tooling to cut these more efficiently is still in R&D.
Thanks for the clarification. Do you know what the variation percentage of B.C. with and without the cut is?
 
Apr 14, 2013
257
19
18
Oklahoma
#9
Thanks


Thanks for the clarification. Do you know what the variation percentage of B.C. with and without the cut is?
Off the top of my head I don’t exactly. I will have to ask my friend developing the cutter.

The nose ring came about cause David was looking into how he could make his pointed bullets also work for hunting. While testing the BC of the bullet what he found was the variance from bullet to bullet was something like half of what the uncut ones are. As bullets are made and pointed there are slight differences in BC from bullet to bullet. This cut nose ring has also been used in his ELR record attempts on the turned solid bullets as well.