I have not used 4350 in my creedmoor’s, just RL16, and I really like it. I get 2760 from my 22” barrel and 2680 from my 20” barrel (both browning x bolts), I got 2700 from my 19” savage. I feel like the 20” is going to speed up a bit after some more firing. Both of my brownings like 41.3 grains in Hornady cases with federal 210m primers, I also shoot 143 eld-x bullets. Absolutely no signs of pressure. I didn’t even work up to pressure, just found the accuracy I like and stuck with it.
As noted by others, I also found very little change in velocity over a large temperature range.
Just don’t buy all of it.... leave some for the rest of us, haha!
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