A 460 is good for 2550 to 2600 with IMR 4350 from 26 inch including muzzle brake. A bit more with double base Re 19.

What velocity were you claiming fro 400 grains in your wildcat, I don't have in front of me. As I remember you were 200 or 300 f/s faster than 460 and if so that should put the Lott at 460 velocities and the 458 Win with 748 perhaps equal to 460 G&A

Mike

Even with 400 gr bullets the Lott will be about
93% of the Weatherby.My cartridge got 3200 fps
with 400 gr..Weatherby about 3000..460G&A about
2850..Lott about 2700 fps..Nice thing about 400 gr spitzers loade in
all brands of these 458 cal rifles including
Weatherby, is it makes your big bore good for longer ranges.And when 400 bullet gets there at the same speed as a 180 in 30-06, has better effect.Ed.

What load did you use to get 460 up to 3000 f/s with 400 grain bullets.

Again, with the same capacity and your cartidge giving 200 f/s more than the 460 then the 458 Lott should equal 460. A 458 Win should be equalling the 460 G&A

Mike

Hubel, That theory is very interesting, and seems to make sense on the surface. I am not a "ballistic engineer" and am definitely not able to spot a flaw in the theory. Nor do I have programs to test the numbers.

I am struggling with the same thing as Mike375 though. If your 458 HE will beat a 460 W by 200 fps, why won't a 458 Lott match the 460 W using the same methods?

Also, ballistically speaking, how much difference does a small shoulder (eg. 500 A2) make? I have trouble calling that case, or even the 470 Mbogo, a bottle neck.

TIA for any insight you can provide.

Canuck

Canuck--If they used a heavy double-base ball
powder, in 460 WEA, instead of Reloader(A low
density double base powder stick) powder,
they would be real close to mine.I don't know if the right ball powder is available anymore.The only real advantage mine has over 460 is the reloadability factor.A way to shoot and save brass expenses by reloading many dozens of times, as there is no neck to work in resizing.And the
Lott with 72% of the case capacity, in grains of
water, of the Weatherby, still gets over 90% of the velocity.
So that is real good.Ed

Ed

Don't forget that 90% of the velocity is 80% of the energy.

But why are your 460 velocities so high with 400 grainers.

My experience with Winchester 748 and 760 has been that additional velocity is only gained when there are no real suitable stick powders. The 308 is an example with 130 grain bullets. 3031 is a bit slow and 4198 is too fast.

Was the 136 grain of Win 760 load in your cartridge for the 500 grain bullet. If it was that would be a very interesting load to use in the 460.

Mike

Mike-Mine was 135 heavily compressed of WW-760.
All the manuals I have about Weatherby reloading
has the max pressure at about 120 gr of WW-760.
It needs just a little slower powder.I don't
know if there is any of the right high
density ball powder around..A full compressed load
of the right powder should get Weatherby with
400 gr close to 3000.What I have found is mine is so much easier to get the combinations to work.
Ed.

Was the 136 grains in your cartridge with 500 grainers? I thought in a previous post you said your 460 actually did 3000 f/s with 400 grainers.

I have never got extra velocity with Winchester Ball unless there was no suitable stick powder and if there is a suitable stick powder then usually velocity with ball powder is lower.

The only straight case I have done much with is the 458 Win. I found that from 3 different M70s all with the 22 inch barrel that about 2050 to 2080 was tops with 500 grainers using Win 748 and also two Australian stick powders that equate to 4198 and 3031. Actually the 458 does less velocity than is predicted from the velocities from 338 Win and 375/338 and allowing from the slightly smaller case capacity of the 458. The increase in energy is half of the percentage increase in bore area, assuming the same case capacity.

Mike

Mike--- it was 450 gr that went 3000, 400 gr went
3200 with my 458.This with soft brass.Will do more
with Hornebers tough hard brass.

My 458WIN I loaded
for years before I built wildcat, I lengthened chamber and let brass stretch, and I could get
500 gr up to 2200 with extra powder and loading
bullet out.I used gun as single shot anyway with
mag well full of lead shot and epoxy.Ed.

Following question from Brian---

How much would you charge to rebarrel a Ruger #1 and chamber to your cartridge using a Douglas barrel,30 inches in length?I'm kind of interested.
Out of a 13 pound rifle,with a KDF brake,recoil shouldn't be much more than a regular old 458 Winchester.
Brian.
Here is my reply--

Brian-That is what we like hear is folks interested.I am not a FFL gunsmith, I just do my own.Don't like the bureaucrap.But there are many
on here,the best in the world.They will help you.
Any reading this please give a general idea of costs.Whichever gunsmith gets reamer first,
after brass is done may get a few to do.
As soon as run of brass is done and load tested
to make sure the chambers are right,I have reamer
manufacturer all set to make them.Same for dies.
If you weight gun and use 30 inch barrel,which
is length I recommend,with good pad you won't need brake. If you want to have brake with that
barrel and weight it will be like a 338.I am
going to post this on my thread about making run of brass also.Ed.