Anyone has the 8.6 BLK h20 case capacity? How close is it to 338 Fed ? Just trying to run some numbers off quickload
Use the 338 whisper 7 BR page , adjust case length, COAL, capacity, and bullet parameters. Those will be different, but not far off. Your H2O case capacity depends on the cases one selects or the brass they are formed out of. The 30-06, 308, 6.5 CM, or brand of new 8.6 Blkout cases.
3 twist loads in my experience topped out long before the 6.5 twist, like 3 grains of powder...but my early Faxon barrel was very rough rifling, which didn't help, and had to be lapped to be useful.
H20 capacity will very 46.4 gr for my CM cases, 47.3 gr for hybrid cases, less capacity for 30-06 cases.
H20 capacity of the 338 Federal is listed as 56.7 gr.
But the 338 Federal velocity can be equaled in a bolt gun and even surpassed in long heavy bullets with long barrel and hybrid cases, by using some of the extra pressure needed from the hybrid cases.
There are always compromises, and choices need to be made. What is your main purpose for the gun.
You can't get these velocities in a 3 twist and ya can't get them in a short barrel.
I play with subs but never intend to use them on a game animal.
A 200 gr bullet at 2570 fps or a 160 gr Barnes at 2800 fps out of my 8.6 bolt gun, would kill very well, and lots cheaper than Maker, but I play with Maker bullets, and Lehigh Defense bullets subs, & Close Quarters, 300 blkout over 2600 fps.
Plus make my own, like 30 Mauser 86 gr pistol bullets hollow pointed for small game.
I just relate what I do, those who can barrow from it, modify it, report on it, are welcome to do so.
The subs are limited, but supers are wide open to velocity and better accuracy if one chooses a slower twist, and a longer barrel.
If you want a short barrel and subs, you will not get full supper sonic potential, you'll be way behind on velocity, energy, & trajectory, especially with the lighter bullets.
But who cares about that at 75 yds or less if your sub bullets are performing.
Choices, and compromise, what do you want to accomplish.
