Any advantage to 460 rowland over 45 super?

[Abert Rim]

I don't know how you could possibly fire a .460 Rowland round in a .45 Super chamber, as the Rowland is 1/16th longer. The Super is beefier in the web, but otherwise identical externally to the .45 ACP case.
Charlie, do you shoot at the Butterfield range? I used to work at the range run by Otero County.

[M-Tecs]

I believe the OP is asking if it would be safe to use 460 Rowland load data in the 45 Super Case in a firearm rated for 460 Rowland.

[charlie b]

And I think the real question is, which guns are capable of handling the pressures developed by .460 Rowland loads?

[Longranger44]

You answered your question in your original post. The 460 Rowland is longer, so it won't get put in a "wrong" gun by error should you pass away and your guns and ammo end up in the hands of some less knowledgeable person. I am at the stage where all my "+P+". ammo is getting used up so should one of my kids or grandkids grab a box of my reloads after I am gone, they won't break a gun or injure themselves through inadvertently loading the wrong ammo in the wrong gun.

I feel like that could be easily accomplished by putting it in a box marked 45 super do not fire in 45 ACP gun with lots of exclamation points. Seems like a pretty specific scenario to Warrant a completely different cartridge when it has no actual advantage power wise

[Longranger44]

I believe the OP is asking if it would be safe to use 460 Rowland load data in the 45 Super Case in a firearm rated for 460 Rowland.

Yes that's exactly what I mean

[Longranger44]

And I think the real question is, which guns are capable of handling the pressures developed by .460 Rowland loads?

Considering the fact that 357 Sig runs at the same pressure I'd say most pistols, obviously Glock FN Springfield HK and 1911s since they are listed by Rowland

[Longranger44]

So, yes, you could fire the .460 Rowland load in a .45 super. Rowland claims to make their barrels out of special material, but, I don't know what pressures they run at so don't know if a std 1911 barrel would work or not. You would at least need to beef up the recoil spring.

Find someone with a strain gage setup to see what pressure it is running at.

FWIW, ran GRT with 230gn and AA7. To get 1300fps it would be upward of 35000psi.

Well Roland claims to use the same 416 stainless that pretty much everyone else does, they do mention heat treat but they are pretty vague about it, I'm guessing it's purely marketing. Seeing as the pressures are no higher than something like a 357 Sig I doubt they're doing anything special

[Longranger44]

I've read of reports of primer flow with 460 Rowland rounds but never heard anything about the chamber walls being too thin or anything like that. I'm thinking that 450 SMC would be even stronger yet than the Ryland with the small primer, however brass seems to be unobtainium at the moment

[charlie b]

I guess you tot answers to all of your questions. I'd get some .45super brass and try the heavier loads.

FWIW, there were a few threads about dealing with increased recoil in the 1911 platform. I believe it was on the subject of hot 10mm loads but maybe it was another Rowland discussion. Things like higher tension hammer springs and squared off firing pin retainers to delay the unlocking. That holds the barrel locked until the pressure reduces a bit, leading to a lower rated recoil spring. I've never tried any of that since my days with 'heavy' guns is over.

[Paul105]

In 1911s, you can mitigate primer flow somewhat (maybe altogether) with an oversized firing pin combined with heavier firing pin spring. Oversized firing pins are offered by Wilson and EGW probably others.

Oversized pins will take some trial and error fitting.

FWIW,

Paul