Jerry,
Yes, I did chrono the loads. IMR4350 is also my favorite powder for the .243, and I've used it almost exclusively since 1976, but I couldn't find it during the early obama administration years. Since I use 4350 in several different cartridges, and couldn't seem to find any, I bought the 7828 to try in my 7mm mag. It shot horribly from that rifle, no matter the load.
So, I looked at some loading manuals, and started playing with the .243. 5 shot strings were mostly within 10 fps of each other, with max load going between 3030 and 3040 fps. More than enough velocity for thumping deer sized critters in Az, and it's more accurate than any load I've ever tried using IMR4350; although 4350 will shoot under an inch @ 100 yards without any problems.
When chronographing my old IMR4350 load (100 grain spbt bullets), I did get 3150 fps without any signs of pressure in my rifle. That said, the load is/was 1.7 grains over most reloading manual's suggested max load.
As a note, my load using IMR7828SSC did not completely fill the case, although it was pretty full. With a compacted load, I could have put more powder in the case. With the results I was getting, I no reason to push tings. 100 fps isn't something I'd ever notice in the field.
Daryl