what comes after 10mm?

Just off the top of my head, semi-auto cartridges that can equal or exceed the 10mm in power include .45 Super, .460 Rowland, 10mm Magnum, .44 Auto Mag, .45 Winchester Magnum, and .50 Action Express. Also, while they're typically revolver cartridges, .357 Magnum, .41 Magnum, and .44 Magnum have all been chambered in semi-autos and can equal or exceed even full-power 10mm with the right loadings.
 
The Federal 10mm loads are 10mm "lite." They still mimic the loads they produced when the FBI was flirting with the 10mm and wanted a lighter load for the recoil sensitive. From this, the .40 SW was born and Federal's 10mm loads are pretty much the same as their .40 SW loads. There are a number of different loads available that will push a 180 gr 10mm at about 1400 fps and a 200 gr. bullet at about 1200 fps.

As CarbineCaleb mentioned, the 10mm is probably the most powerful semi-auto load developed in mass quantities. As others have indicated, you can indeed force a square peg into a round hole and shoot revolver rounds out of a semi-auto. That concept has really never caught on, however.
 
45 super! There are bevel based 300gr bullets for 45 autos that can be pushed to about 1100 fps at 25k psi and penetrate amazingly well (300 gr NCP I think is their name). Even at 45 +P levels they could probably go through 2 or 3 feet of bear at 7 yards.

I'd rather have 14 rounds of that than 6 of 460, but I'm like that.

That said, neither rounds sounds 'fun' to shoot for long.
 
I'll take one six foot wound channel from a 360 grain LBT WLN .454 at 1,400 plus fps, over three or four two to three foot wound channels from a 10mm or anything else in that class.
 
oddly enough, i went to the store last nite and was flipping through the gun magazines, and there was one that was discussing the pros and cons of the 40s&w. They went on to say that the 10mm is the hottest round that you can readily find. if i had only went a day earlier. i was looking up the 460rowland and some called it the 45magnum. they had a modified 1911 and it seemed to do pretty good. Got me wondering if i can modify one of my springfields to that.
 
"Got me wondering if i can modify one of my springfields to that."
From the Owner of Buffalo Bore, Tim Sundles, on their site under Rowland 460:
"To acquire 460 Rowland test guns, I sent two of my 1911 45 acp pistols to Clark Custom Guns and had them install their 460 Rowland conversion kits. To date the converted 1911’s work great. I can fire a 255gr. hard cast bullet @ 1300 fps or a 230gr. FMJ-FN bullet @ 1350 fps. What a great "woods" pistol that still maintains combat pistol qualities."
He goes on to add:
"It should be noted that my 460 Rowland conversions are Clark Custom conversions. I did not try this ammunition in conversions manufactured by anyone other than Clark. This ammunition was reliable and safe in my test conversions, but I cannot verify the reliability or safety of this ammunition in conversions done by anyone other than Clark Custom."
A 250 grain hard cast bullet at 1,300 fps is some serious medicine.
 
Last edited:
In terms of a round that is more powerful that you can upgrade to from 10mm with a simple barrel change, take a look at the 9x25 Dillon:

http://www.underwoodammo.com/9x25mmdillon125graingolddotjacketedhollowpointboxof50.aspx

As I understand it, it's basically the same concept of what was done with the .40 to create the .357, only you're using 10mm brass and necking it down to 9mm. Something like that. I hear they are loud, as well.

Technical Information

Caliber: 9x25mm Dillon
Bullet Weight: 125 Grains
Bullet Style: Speer Bonded Jacketed Hollow Point
Case Type: Brass

Ballistics Information:

Muzzle Velocity: 1700 fps
Muzzle Energy: 802 ft. lbs.
 
Depends what platform you use that 9X25 in. I had to go down to a 10 or 11 pound recoil spring with my compensated 1911.
 
autos006.jpg


.45 WinMag

While a bit on the large end, I still consider it a service pistol class, it is, after all, a slightly stretched 1911A1.

And don't whine about it being too big. There are bigger yet in my collection, including Wildey, Desert Eagle and Auto Mag...

Service pistol is worn open, not concealed, so a little on the large size, for control of the power isn't a bad thing.
 
I have a family group of Automags... AM-2 shoots 22 mag, AM-3 shoots 30 Carbine, AM-4 shoots 10mm Magnum ( I love this round, it's obviously hotter than the standard 10 mm, very similar to the 41 Magnum revolver round ) AM-5 shoots 50 A.E. ( this is the smallest lightest semi chambered in this round, & it's a handfull, but it easily bests the 10 mm )... with built in comp, this one knocks the leaves off the surrounding trees when fired

still haven't picked up an Auto Mag 1 yet in 44 Auto Mag... but will someday to complete the family group
 
In the 1911 platform, .460 Rowland is probably the next worthwhile step, and you can get a "conversion" for a .45 that you already own. .45 Super is easiest - if you have that .45 - but it might not even be more "powerful" than 10mm, though you do get a bigger bullet even if the "power" is the same.
I shot a H&K 91 cut down to the size of a MP5, so that would be a pretty powerful pistol (.308), since we appear to be talking anything without a buttstock as a pistol.
 
You must log in or register to reply here.
Back
Top