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I tried in in a 6 SLR with some pretty good success. The 6 SLR is a modified 243 win so velocities should be similar, I was getting around 3050 fps out of a 24" barrel with good accuracy.
Got some very decent accuracy. I have noticed that it does fluctuate a bit more with temperature than Hodgdon's Extreme powder but I ran out and switched powder before diving into it more.
I just finished developing a new load for my 338 Win Mag, using 100v.
Behind the 210 Partition, it is driving them at 3022 avg, and groups are
very nice indeed. 3 of 4 groups were under ¾moa. [26" barrel]
Dave.