Originally Posted by coupalr
I am runnung 110gr of US869 with 300gr SMK. It cronoed 3035 out of my 30" barrel.
This is from a post by 'long ranger'. He's built alot of these and routinely gets well past 3K fps with 300SMK and 30" Rock Creek tubes treated with Gun Juice.
"338LAI has 126 gr water capacity, I have found 111.5 gr of US869 works REALLY well and no pressure.
Not sure why it works but it truly does. So far in 1 of my own rifles the original brass has 11 reloading and is still not showing any signs of growth or weakening.
The Edge if memory serves has 115 grains of water capacity and the Edge AI has 127."
See: anything between the 338 Edge and the 338 AM?
Kirby says he typically finds the sweet spot with 300SMK and his 338AX with Retumbo between 100-102g and typically runs between 2900 to 3050 fps or so with 300SMK. I phoned one of his customers lately who is running his load at 102.something Retumbo...so a bit hotter than what Kirby usually uses.
See: Couple new rigs from APS....
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