IMR 4831 has a slightly slower burn rate speed than IMR 4350. It provides top velocities and performance with heavier bullets in medium-sized magnums.
When I saw the thread title, the number 270 popped into my head. Alternatively, you could use a 30-06 with 165s or a 300 Win Mag with lighter bullets.
He recommends 72 grains of powder with 225 grains of flat-base TSX bullets for his Sako 338-Win mag.
Fortunately, I was able to acquire a Sauer lightweight 30-06 that would work wonderfully with the 168 TSXs that cost me $59 grand.
Accubonds’ 280 wt/by weight of only 56 g is impressive.
Many of the 270s were armed with 140-grain bullets. According to my personal experience, IMR4350 performed best with 130-gram projectiles. This revolutionary new powder works much more quickly than the standard H4831. The legendary.270 WCF load developed by Jack O’Connor using 20mm Oerlikon H4831 ammunition from World War II was a smashing success.
Except that it is no longer sold in paper bags for pennies per pound, H4831’s modern analogue is indistinguishable from the original. IMR 4931 is a great powder option for many different types of cartridges. I am proficient in a wide range of calibers, including the 6mm Rem.,.243 Win., 30:06 Win., and 7mm Rem. Mag. If I couldn’t find a good load for my.270 rifle, I would start to doubt how reliable it was.
A 300 Winchester Magnum, to be exact. I’ve been using 71.0 grains of it under a 190-grain SMK seated.005 off the lands in a Savage 112 HB for a long time. (Prime = $215 million Fed) The reliability and precision are superb. I’m happy to say that I’ve used it to finish off several one-hole groups (needing only three shots) with flying colors. An approximate speed of 2800 feet per second is being reached. There are 270 WCFs who prefer IMR 4831. If it won’t shoot 57-58 grain IMR 4831 or 130 grain Sierras, you have a rogue. 270… The truth hurts sometimes.