338 RUM in a single shot configuration in a Rem 700 action.
Just barely long enough to eject loaded Aluminum tipped loads without any action alterations.
Is behind the edge only 100 to 200 FPS depending on who loads which.
85 or so grains of 50 BMG produces around 2400 w/225 NAB out of a Remmy 26" sporter barrel. With the Holland QD brake there is no recoil.
- No need for a second barrel
- No need for a strange and pretty much useless chamber such as 338-08
- No need for barrel vise or wrench.
- No need for extra dies etc.
- With 265s, 300 SMK Edge performance is duplicated or possibly improved.
- Not exciting at all.
- Not nifty
- No strutting rights at the range.
Conclusion: Go with the switch barrel idea which allows much bigger dreamin';) That's what I'd do.
You want to use a 338 federal to seat the heaviest bullets. Wouldnt' the recoil be a little high for a F class rifle? I was checking the recoil for a 338 win mag and then I just imput the data for what I would guess a 338-06 improve would do compared to a 338 win - I was guessing at 2250 fps w/ a 300 gr bullet. A 12 pound rifle will still kick at about 23 foot pounds - about midway between a sporter weight 300 WSM - and 30-06 shooting 180's. Even if you bump the rifle up to 15 pounds it would be stomping around 19 footpounds - more like a sporter 270 shooting heavy bullets. If you could take the punishment, your on to something. What about just taking a 308 and pushing a 240 smk through it??
I used to re-load but now I "hand-load".
-- Well, at least I try --
The new Henson 308 220 Al tipped bullet has a bc near 0.9. So that would get you back to the 308. But Henson, and hopefully Wildcat, are going to build smaller caliber Al tipped high bc bullets. If you can keep the bc anywhere near 0.9 and get down to 264 caliber or smaller, then the recoil becomes much more manageable. A 0.8-0.9 bc bullet out of the 6.5mm-284 would nearly there. Maybe they can get near 0.8 bc out of the 6mm and keep velocity near 3000 fps.
I'm really stoaked about the Henson 220. In a light rifle in 300WSM or heavier in 300 RUM. That will kill feral pigs a long ways off.