Went to the range today with my new toy. Rem Sendero long action, 28 inch 9 twist douglas barrel, 7 Rum necked down to 6.5 mm. Started off with 85 gr of 869 and got hang fire. Increased charge in 1/2 grain increments up to 89 grs and could not get rid of the hang fire. Swithed to Ramshot Magnum. Started out with 83 grs and went to 86 grs. Out of 20 shots with the Magnum powder, had 3 hang fires. I'm using CCI 250 primers. Does any body have any idea what is going on.