TX35W
I run hogdon CFE223 in my Whelen using Speers reloading data. I have a standard Whelen chamber and can load to a coal of 3.4 inches this gives me a chroboed velocity of 2,700fps out of my 25 inch one in 12 barrel.
With the 310s I use an 18 inch drop tube and H4350.
This allows more powder in the case without any compression. My best loads gave 2,455 fps and no pressure signs but recoil was rather stout. I settled on 2,350fps and call that my working load.
With CFE223 275gn Woodleigh PPSP projectiles chronoed a tad under 2,600fps with no pressure signs
Bob
I run the 250's over MR-2000, IMR 4895, RL15...all are very accurate but just wanted to try this new RL15.5 for temp stability. MR-2000 gives the best velocities from both my 20 and 26" 1:12 but its def a bit temp sensitive.
I will try the H4350 with the 310's. In my 26" Big Game and Mr-2000 both get the 310's to 2400 without any noticeable pressure signs but 2250 seems to be the reliable max in the 20". Maybe the slower powder will help.
