Home Forums Reloading Big Game Rifles 7mm Rem Mag 140 gr Accubonds

Not a 140gr Accubond, but my Winchester Model 70 in 7mm Rem. Mag. shoots the 140gr Barnes T-TSX into itty bitty groups using 71.0 gr of IMR 7977. This load chronographed at 3,100 fps(IMR's max charge for 7977 w/140gr bullet in 7mm Rem Mag is 72.0 gr.). My load didn't exhibit any high pressure signs and I wouldn't hesitate to go up another grain to max out at 72 but accuracy was so good at 3100 fps that I didn't see any point in pushing the envelope. In my experience these new Enduron powders from IMR are a lot less sensitive to temperatures than other powders such as RL 19 and RL 22(both of which are fine powders). RL 26 mentioned above is another excellent temp insensitive powder that will give you top velocities if your gun likes it(mine didn't).

Good luck. 7mm Rem. Mag is one of the all-time greats, and a favorite of mine.

Leftybolt