Another new powder, from Winchester this time

[Ian M]

Hodgdon's will be distributing this. Here is a press release on the new Win. powder. I try to keep you guys well informed, eh!

WINCHESTER® SMOKELESS PROPELLANT “For Loading Professionals”
Tim Vaitekunas Director of Marketing and R&D today announced a potent new addition to the Winchester Smokeless line called Supreme 780™. Supreme 780 is the same powder loaded in Winchester’s factory Supreme® ammunition including 243 Win., 270 Win., and 300 Win. Mag.

“This propellant allows the handloader to duplicate Winchester Supreme factory loads,” said Tim discussing this product. “Our state-of-art ballistics laboratory has initially developed data for 14 different cartridges with over 35 different recipes”.

Supreme 780 is a Ball Powder® propellant, which means easy measure flow resulting in the most consistent charge weights. Comparable in burn speed to H4831®, it fills a spot that previously was not available in Winchester Smokeless offerings.

One and eight pound containers will be available at dealers Spring 2008. Supreme 780 reloads are now on-line at wwpowder.com in the Reloading Data Center.

[brianwinzor]

I always like to hear that a new slow burning propellant is being released, but lets hope that they continue to make it available, and not discontinue within a few years, like they did with 780BR, 785, WMR, and WXR.

Supreme 780 sounds almost like a re release of WIN 780BR or 785 if the burning rate is similar to H4831. I still have some 785 (and WMR & WXR) from several different lots left from purchases about 20 years ago, and so far my testing in a variety of cases has shown that the burning rate of 785 is the same or within about 0.5 grains of H4831.

I agree that it will be interesting to hear shooters experiences with Supreme 780.