From David Tubb's Facebook page today.
Update: New bullets will be available the first week of July.
Here is my logic behind the new DTAC 115 REBATED BOATTAIL
Having shot 6mm fast twist barrels with a good degree of success this bullet short history should be an interesting read.
In the 1980’s we shot 107 weight range 6mm bullets for Silhouette and High Power competitions. Lower recoil and good wind drift were paramount in coming to the 6mm bullet diameter.
After I developed the 6XC case around 2003 I approached Sierra about making me a 6mm bullet in the 115 grain range. They ran prototypes in 112, 115, and 120 grain configurations. I thoroughly tested these and decided on the 115 gr. In 2004 I used these at Camp Perry and the result was a Long Range National Championship aggregate with a perfect score was the result 1450x101. Enough Said……..
In 2007 Sierra had just introduced their plastic tipped bullets. I had them run a test batch of plastic tipped 117 gr weights. These didn’t pass my criteria.
We the ran another test batch of 111 gr plastic tip 6mm and they looked great in the Sierra tunnel tests. However when shot them over an Oehler 43 at 1000 yards the results indicated the plastic tips were deformed or nonexistent at the target. These didn’t pass my criteria.
FYI -- the plastic tip deformation testing information precedes the Hornady Plastic tips “Are Bad” advertising campaign by more than 7 years -- LOL.
When using a 308 early in my High Power rifle career we shot 190 gr Sierras at the 600 yard stage. When 600 yard accuracy began to fall off a switch to a 185 gr Lapua rebated boat tail brought the accuracy back. I remember shooting some very high X count scores with 185 Lapuas.
The reason the Lapua worked in a worn barrel is because the rebated boattail allows the bullet to opturate to fit the worn throat and prevent less gas leakage around the bullet when fired.
I had a bullet maker friend reform some 6mm 115’s with a rebated boattail (RBT) in 2015 and had excellent results .
So it was a natural move to redesign the current DTAC 115 6mm with a RBT and a 7 degree boattail.
The new DTAC 115 RBT testing is complete and can claim the following;
G1 1000 yard BC of .620.
Stabilized out of true 8 twist or faster barrel at velocities approaching 3000 fps at Sea Level.
Extended 6mm barrel life resulting from the RBT design
$145 for 500, taking pre-orders
Call Superior Shooting Systems at 806-323-9488 8:30am-4:30pm central time
Update: New bullets will be available the first week of July.
Here is my logic behind the new DTAC 115 REBATED BOATTAIL
Having shot 6mm fast twist barrels with a good degree of success this bullet short history should be an interesting read.
In the 1980’s we shot 107 weight range 6mm bullets for Silhouette and High Power competitions. Lower recoil and good wind drift were paramount in coming to the 6mm bullet diameter.
After I developed the 6XC case around 2003 I approached Sierra about making me a 6mm bullet in the 115 grain range. They ran prototypes in 112, 115, and 120 grain configurations. I thoroughly tested these and decided on the 115 gr. In 2004 I used these at Camp Perry and the result was a Long Range National Championship aggregate with a perfect score was the result 1450x101. Enough Said……..
In 2007 Sierra had just introduced their plastic tipped bullets. I had them run a test batch of plastic tipped 117 gr weights. These didn’t pass my criteria.
We the ran another test batch of 111 gr plastic tip 6mm and they looked great in the Sierra tunnel tests. However when shot them over an Oehler 43 at 1000 yards the results indicated the plastic tips were deformed or nonexistent at the target. These didn’t pass my criteria.
FYI -- the plastic tip deformation testing information precedes the Hornady Plastic tips “Are Bad” advertising campaign by more than 7 years -- LOL.
When using a 308 early in my High Power rifle career we shot 190 gr Sierras at the 600 yard stage. When 600 yard accuracy began to fall off a switch to a 185 gr Lapua rebated boat tail brought the accuracy back. I remember shooting some very high X count scores with 185 Lapuas.
The reason the Lapua worked in a worn barrel is because the rebated boattail allows the bullet to opturate to fit the worn throat and prevent less gas leakage around the bullet when fired.
I had a bullet maker friend reform some 6mm 115’s with a rebated boattail (RBT) in 2015 and had excellent results .
So it was a natural move to redesign the current DTAC 115 6mm with a RBT and a 7 degree boattail.
The new DTAC 115 RBT testing is complete and can claim the following;
G1 1000 yard BC of .620.
Stabilized out of true 8 twist or faster barrel at velocities approaching 3000 fps at Sea Level.
Extended 6mm barrel life resulting from the RBT design
$145 for 500, taking pre-orders
Call Superior Shooting Systems at 806-323-9488 8:30am-4:30pm central time
