I used to use it in 220 Swift with 50s & 52s before I found RL15. It worked fairly well in 22-250 until I tried RL12 or H4895 & then later stepped up to a 22-250 Ackley which is a whole new ballgame. I used to use it in 30-06 with 147/150s until I sold the Garand. It worked well in 375 H&H until I sold that rifle. It worked really well in a 7-08 match rifle I once had with Sierra 150s. Never could get enough in 358 Win. cases, but my Whelens liked it until RL-15 happened. It's a very useful powder, but mostly a backup now. RL15 meters so much better out of a powder measure, but I keep a couple ponds of 4064 around just in case RL15 dries up.
