April 10th, 2007

6mm 117 grain DTACs–First Look

Superior Shooting Systems has released a new 117 gr DTAC bullet, designed for 1:7.5″ or faster twist barrels. David Tubb advises these 117s require at least .040″ more throat length compared to his 115s. Robert Whitley got some new 117s and he told us they look very impressive: “The 117 gr bullet looks great, but it’s a real Goliath for a 6mm projectile. I checked on how the bullet sits in relation to the throating of various 6mms. I measured them multiple times in three different barrels–two with brand new, unfired chambers. It looks like you need about .050″ – .060″ more freebore than you need with a DTAC 115 to keep the junction of the boat tail and bearing surface in the same place, and about .125″ – .135″ more freebore than you need with a Sierra 107 to keep the junction of the boat tail and bearing surface in the same place. (I have cases with a slit up the neck so I can see where the junction of the bearing surface and boat tail sits in relation to the neck and shoulder of the case.)”

Robert adds: “I will try these in a 6XC (after I throat out one of my barrels a bit) but the bullet looks big for a 6XC case. I am also looking forward to trying these in the 6mm Super X, the 6CM, and the 6mm Remington I have, all of which have a good bit more powder capacity to enable the use of slower powders (H4831SC, H1000, etc.) with such a bullet. If these shoot as well as they look, the 6mms may give a 6.5 x284 some real competition at long range–we’ll see!”

DTAC 117 gr Bullet David Tubb

Left to Right: Boron nitride-coated 117 gr bullet (1.376″) ,
Moly 115gr DTAC (1.290″), Moly 107 Sierra MK (1.225″)

Permalink Bullets, Brass, Ammo, Gunsmithing No Comments »
April 10th, 2007

New 6-24×50 Bushnell with 30mm Tube

The new Bushnell 4200 Elite 6-24x50mm “Tactical” SF has been released. It features a 30mm main tube, 45 MOA of elevation (top to bottom), 12 MOA per turret revolution, and side-focus parallax adjustment. The scope weighs 22 ounces, eye relief is 3″, and the multi-coated lenses feature RainGuard weather-proofing. A number of vendors have the new scope in stock at prices ranging from $530.00 to $580.00. Currently, befitting its “tactical” name, the scope only comes with a MilDot reticle. Ranging is performed at 12X power, indicated by a red dot on the zoom ring.

Bushnell 6-24x50 Tactical side-focus

Mike of CSgunworks.com reports: “The glass is good. The finish is nice and the turrets feel really positive. I like the fact that it ranges at 12x not 10x, and the side parallax is well-marked all the way down to 25 yards. The crosshairs on the Mil-Dot reticle are a little thicker than I would like, but not too bad. Overall, for the price this scope is hard to beat. I like it more than the Burris TAC scopes.” Mike plans to comparison test the new Bushnell vs. other mid-priced tactical scopes–watch this Bulletin for updates. You can purchase the new 30mm Bushnell 6-24×50 SF at Csgunworks.com, SWFA.com, and The Optic Zone.

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