My first cast bullet loads with Reloader 7 were in a 38-55. It seemed to build pressure quickly, or at least more quickly than I liked, so I switched to AA2015 and didn't look back. A couple of years back I was working with a 5.56x45 AR with cast and worked backwards in burn rate until I found Reloader 7 delivering the consistent accuracy I was looking for. I loaded the remainder of that lot, and bought more. The new cans were marked "Made in Sweden" vs the older cans "Made in USA". To get the same accuracy with the new lot as the old, I had to back off 10%. I didn't chrono to see how the velocities compared, and didn't give it much thought until just recently.
Most of my 30cal loads 30-30, 308, 30-06 are/were over 2400, 5744, and H322. The 300BLK has been fed H110 and 4227 almost exclusively. Quicksylver's Lee 155s over Reloader 7 in the '06 caught my attention, and then Ian's experiments with heavy bullet subs in the 300BLK again lit the light.
I shot some 203gr over what I expected to be "too light to cycle" 300BLK today, and was surprised to see how little unburned powder remained. With 2400 seemingly "unobtainium" and 5744 so pricey, I'll have to work this into some of my other 30cal to see what I've been missing.
Most of my 30cal loads 30-30, 308, 30-06 are/were over 2400, 5744, and H322. The 300BLK has been fed H110 and 4227 almost exclusively. Quicksylver's Lee 155s over Reloader 7 in the '06 caught my attention, and then Ian's experiments with heavy bullet subs in the 300BLK again lit the light.
I shot some 203gr over what I expected to be "too light to cycle" 300BLK today, and was surprised to see how little unburned powder remained. With 2400 seemingly "unobtainium" and 5744 so pricey, I'll have to work this into some of my other 30cal to see what I've been missing.