Re: 300 RUM Pressures
What you are describing are signs of too much pressure. That powder might be a bit fast burning for the particular combination of components you have. Retumbo was specifically designed with the 180g bullet in mind and the large overbore chambering like the 300RUM and 30-378. If I recall correctly the number printed on the jug of Retumbo is 100g for the 180g bullet at 3300fps. I believe the load I used for the RUM was 96.3g Retumbo with the 180 NAB at 3300fps. That was tops for me in the 26" Rem 700, perhaps because I was right on the lands with no bullet jump. Good luck.
Some (many) on this site would argue that a 180g bullet is too light a bullet to fully utilize the potential of the 300 RUM. Many are going with the 200g NAB or even better, the 210g Berger. Might try Retumbo or perhpas H50BMG--not sure. Ask around. I didn't get that great of velocity with the 200AB and Retumbo, but got 3200 fps MV with the 200AB and 109.5g of US 869. Now, I've 'evolved' to the 240SMK after going through all the lighter bullets and much prefer it. With 104.2g US869 behind it (colder weather load), I am able to extract more energy (with a much higher BC bullet) out of that chambering than I have with any other combination of components, in my rifle. Good luck.
In the beginning God created the heavens and the earth. Genesis 1:1
"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God?" Thomas Jefferson - Notes on the State of Virginia
- Shelter for Your WildSide - http://www.youtube.com/watch?v=tYwgo...&feature=g-upl