.45ACP barrel length?

[Bigfoot]

I've never been on a hog hunt so I don't know if a standard .45ACP would be enough. I know that a Marlin 45 Carbine will handle +P and .45 Super ammo with a stiffer Wolfe recoil spring, I'm hoping the Hi-Point will also. The .45 Super with 255 grain hard cast bullets should be enough, but if not look into the .460 Rowland it's about even with than the 45 LC. Load data is pretty scarce but here are some 260 grain loads from a handgun, add a couple hundred FPS for a carbine length barrel. Make sure to click the load data at the bottom. http://www.realguns.com/archives/106.htm

Here's a 1911 Colt carbine conversion for it. http://www.mechtechsys.com/index.html

I ran the Rowlands 1:16 twist into an online twist calculator and it said it should stabilise really long bullets. I'm not sure that I trust that calculator, it might not be accurate at handgun velocities. http://www.shortmags.org/shortmags/r...stRateCalc.asp Remember that the longer barrel will stabilise a bullet better than a short handgun barrel with the same twist.

Alan, what was the velocity of that 250 grain Speer SWC and the range of the deer? Nice performance.

[Murmur]

Theres the heap of info at this link http://www.teppojutsu.com/458.htm
Makes me think that the 1 1/2" 45/70 could be fun. The case capacity is looks close to the socom, cases are easy to get and will suit the contender. The above web site lists that a 1-14 twist will handle 500-600gr bullets at sub speeds even with a short barrel. Anybody have a link to a twist rate calculator to confirm what barrel twist would be required if I went down the 1 1/2" 45/70 route with 500-600gr bullets at sub speeds?

[d-mon]

I will try to put my hand on a very good one i have somewhere on my computer.
Far better than the greenhill formula.

ND

[tp555]

The 458 socom has the same head size as the 308 or base if you want to call it
that.The ar bolt can be machined to .510" which is about the max.Tromix made and sold ar's in 50 AE which has the .510 dia bolt faces. It required a special extractor. So does the socom. Machining the ar bolt to .510 leaves a paper thin
amount of material from the original round part. The bolt held up to the pressures and worked.The biggest cal in an ar15 is the 510 phantom. It is 510 cal same blank as 50bmg. The bolt face is .530".to do this they use olympic
arms wssm parts.The bolt.bolt carrier,upper and barrel extension are redesigned
and bigger then the standard ar15 parts. I had the opportunity to examine a wssm barrel recently.regards.