450Bushmaster.net

B swift wrote:Can you find or do you know>? Relative energy of the 20 mm>??? Obviously I underestimated you with the .50BMG? THANKS KINDLY WC! You da man!!!

I think the values may change past .500".
But if you know the weight and velocities we could give it a shot.

20mm = 0.7874".
Speed = ? (In FPS)
Weight= ? (In grains)

OK, 2000gr and that's from a 87" barrel and 2800fps.

I can't quite tell you the real details, but I am not shooting 20mm cannon round, mine is a .700" bullet. What I can say is it's single man portable and will be something in the 5rd mag area and semi-auto. In looking at the Mock-Ups, it really is a ridiculous round, way-way over kill for anything on this planet, but it's just an effort to show the state-of-the-art, a Holy-Cow ain't we bad to the bone, kind of thing and asides, I plan to build 25/yr for $50,000 grand per, which isn't to bad considering, the .700 H&H Nitro Express Double Rifle is selling for $750,000+- and ammo going for $300+- bucks apiece..

..t

wildcatter wrote:OK, 2000gr and that's from a 87" barrel and 2800fps.

I can't quite tell you the real details, but I am not shooting 20mm cannon round, mine is a .700" bullet. What I can say is it's single man portable and will be something in the 5rd mag area and semi-auto. In looking at the Mock-Ups, it really is a ridiculous round, way-way over kill for anything on this planet, but it's just an effort to show the state-of-the-art, a Holy-Cow ain't we bad to the bone, kind of thing and asides, I plan to build 25/yr for $50,000 grand per, which isn't to bad considering, the .700 H&H Nitro Express Double Rifle is selling for $750,000+- and ammo going for $300+- bucks apiece..

..t

I thunk Mr M. Nay-Sayer just gacked on his computer screen. And what's all that screaming about?

My father inlaw was complaining that $700 ish was expensive for a lever action 357mag rifle

Have you put the pen to the metal yet?

Don't forget my 350 grain load for the 450B.

gunnut (July 8,2012) wrote:OK guys, here’s some details. 451/284W Case trimmed to 2.085. 230FMJ. Side crimp .466,taper crimp .473. C.O.A.L. 2.5”. Total case capacity is 71.3grns H2O. ...

gunnut-
My apologies for digging out an eight-month-old post. Is your 71.3 grains water capacity the amount of water you can put in an empty 450LM case filled to the top of the case mouth? Or is it the water capacity under the seated 230FMJ bullet?

I'm trying to discover the water capacity of empty 450LM cases. I may have overlooked this value in this thread or elsewhere, but neither I nor google can find it.

Many thanks.
--Bob

The 71.3 is total case capacity of water up to the neck. No bullet seated.

gunnut-
Many thanks for that clarification.
--Bob

MJOLNIR,or, "mee-yown-yeer" bullets, Resized Hornady 500Grn .458 to 452. they grow from 1.332 to 1.355.
The photo indicates to me that the bearing surface is not uniform in the .458 dia. but better in the .452dia.
So, re-sizing .458 to 452 should yield more bearing surface. Dark areas indicate No contact with sizing die! 2 of the same.




I hope to get 1800fps. that would be a semi auto 45-70 with a 20 round box mag!

Gunny is over at his Dad's in AL, shooting with a new Scope on his Lead-Sled. He is having severe problems with his range equipment and not getting very good groups. But, considering those problems, he's still getting 6moa @ 100yds with the 230grainers & 350gr resized bullets. One thing is for certain the 40t barrel wont stabilize the 500gr wont stabilize in that twist and we knew this was going to happen (a 16-18t is more appropriate for the serious heavies and the twist to choose if only the heavies were your desires). Whats encouraging is it looks like 40t will stabilize the 350's.

Green Mountain, makes a .452" 32t barrel for $88 bucks, looks like we'll get one of those, carve it up and shoot the Snot out of it. The 40t is OK for the lighter bullets. but a tighter twist might be a little better, or at least it's looking like it..

..t

PS.. In the mean time for your viewing enjoyment. I just was sent this as a reminder.

This is JAN.1st 2009, we're having a little New Years Cheer. It was a send-off date or my excessive weight. I lost 150lbs after this and have keep it off. In-Other-Words (as I like to say), Excessive Shooting, burns Excessive Calories.. Try that on your Mrs..t

http://www.youtube.com/watch?v=rGhsYwKL_C8
http://www.youtube.com/watch?v=HZkotKZfg6w