28 March 2009, 18:52
arctic70need 300 rem ultra load data
anyone have data for the 300 rem ultra mag using vihtavuori n570 powder and sierra 240 gr matchkings?
29 March 2009, 20:19
jro45For powder in my 300 Rem Ultra Mag I use H1000.
Using that I can get Max loads.
29 March 2009, 23:54
lngshtr1I HAVE FOUND H1000 TO BE A GOOD POWDER FOR THE 7MM ULTRA, BUT JUST CAUSE I COULD, WANTED TO TRY RETUMBO AND WAS VERY WELL PLEASED. I FOUND THAT WITH THE SLOWER BURN RATE MORE POWDER ALSO MEANT LESS AIR VOID WHICH HAS A TENDENCY TO IMPROVE ACCURACY !
30 March 2009, 00:45
jwp475quote:
Originally posted by arctic70:
anyone have data for the 300 rem ultra mag using vihtavuori n570 powder and sierra 240 gr matchkings?
WC-872 and Hogdons US-869 work well with that heavy weight
02 April 2009, 20:47
Blair338/378artic70,
I worked up a load with my custom 300RUM and the 200 Lapus Naturalis; 215M primer, Nosler case and a charge of 93.5grains of N570 gave 3148fps.........with great accuracy.
07 April 2009, 00:43
7mm mashburnWe use 180gr barnes tsx with Retumbo and it shoots great
07 April 2009, 01:11
stubblejumper180gr tsx and r-25 produces 3380fps and averages 5/8" groups at 100 yards.