1700+ fps out of a 40 S&W = Too Hot!

• Dec 22, 2016

• #1

A

atblis

Ultimate Member

May 23, 2010

2,031

Yes, it can be done. Safely, not really.

135 gr Nosler, 12.0 gr of Longshot which is a published load by Hodgdon in 2002.

Glock 20 with stock length Lone Wolf 40 S&W barrel. Chronoed at 1720 fps average.

Yeah, backing off this one a little. 11.5 gr is the max load currently published by Hodgdon. That doesn't bulge cases like this.

Interestingly enough, I talked to Hodgdon and they said they reduced the the max load to 11.5 gr not because of pressure, but because it generated too high of slide velocities.

 

Last edited: Dec 25, 2016

• Dec 22, 2016

• #2

HordesOfKailas

Still learning

Feb 7, 2016

2,205

Utah

You might be ready for 10MM. lolololol

 

• Dec 22, 2016

• #3

Bikebreath

R.I.P.

MDS Supporter

Jun 30, 2009

14,836

in the bowels of Baltimore

I was hoping you were talking about a lever carbine. That's crazy fast from a handgun. Glad you aren't posting form the ER.

 

• Dec 22, 2016

• #4

A

atblis

Ultimate Member

May 23, 2010

2,031

It is a 10mm (with a 40 S&W barrel in it)! Got a Glock 40 on the way. Curious to see what a 7" barrel will net me.

Interesting note is that a 40 S&W will outrun a 357 SIG (staying inside their respective SAAMI pressures).

 

• Dec 22, 2016

• #5

jimbobborg

Oddball caliber fan

Aug 2, 2010

17,120

Northern Virginia

How was the recoil with that load? I'm tempted to try this with my revolver.

 

• Dec 22, 2016

• #6

A

atblis

Ultimate Member

May 23, 2010

2,031

Brutal. Makes a 9x19 feel like a bb gun though.

ETA: Interesting note about Longshot is that it has no perceptible flash.

 

• Dec 22, 2016

• #7

jimbobborg

Oddball caliber fan

Aug 2, 2010

17,120

Northern Virginia

One of the members of the 10mm forum took the same bullet and cranked it to 2200 fps out of a 10mm carbine.

 

• Dec 22, 2016

• #8

A

atblis

Ultimate Member

May 23, 2010

2,031

It explodes water bottles nicely. 800X is still the velocity king, but that metering, oh dear lord.

 

• Dec 22, 2016

• #9

jimbobborg

Oddball caliber fan

Aug 2, 2010

17,120

Northern Virginia

atblis said:

It explodes water bottles nicely. 800X is still the velocity king, but that metering, oh dear lord.

Click to expand...

http://www.midwayusa.com/product/77...500-powder-scale-and-dispenser-combo-110-volt

 

• Dec 22, 2016

• #10

A

atblis

Ultimate Member

May 23, 2010

2,031

Could I mount that to an XL650?

ETA: I guess I could use a powder funnel die, that wouldn't be too bad.

 

• Dec 22, 2016

• #11

jimbobborg

Oddball caliber fan

Aug 2, 2010

17,120

Northern Virginia

atblis said:

Could I mount that to an XL650?

ETA: I guess I could use a powder funnel die, that wouldn't be too bad.

Click to expand...

I wouldn't be loading thousands of rounds of nuclear 10mm loads anyway, but for loads on the bleeding edge like that, I'd use the RCBS combo and a turret press.

 

• Dec 22, 2016

• #12

BUFF7MM

☠Buff➐㎣☠

Mar 4, 2009

13,578

Garrett County

jimbobborg said:

http://www.midwayusa.com/product/77...500-powder-scale-and-dispenser-combo-110-volt

Click to expand...

atblis said:

Could I mount that to an XL650?

ETA: I guess I could use a powder funnel die, that wouldn't be too bad.

Click to expand...

It's a bit cheaper here

https://www.natchezss.com/rcbs-chargemaster-dispenser-and-scale-110-volt.html

 

• Dec 22, 2016

• #13

chrisflhtc

Active Member

Jan 28, 2010

980

Hagerstown

I've seen close to 1500 fps out of my 23 with 155gr mg jhp's

 

• Dec 22, 2016

• #14

BUFF7MM

☠Buff➐㎣☠

Mar 4, 2009

13,578

Garrett County

I've never used Longshot, but 12 grains of anything in a 40 case has to be a compressed load for sure

 

• Dec 22, 2016

• #15

Minuteman

Member

BANNED!!!

Dec 13, 2009

21,393

Maryland, let's make it a better place.

1700+ out of a .40? OMG.

put it in a carbine, then maybe. Anyone make a 10mm lever gun?

 

• Dec 22, 2016

• #16

alucard0822

For great Justice

Oct 29, 2007

17,695

PA

12gr longshot over a 135gr is a fairly well known "nuclear"40 load, the powder is incredible, you run out of room before you get over pressure, have hit stupid velocities in 10, 38super and 460 Rowland with it. Lots of people turn their nose up at 40, but you can load it from 300-600FPE from standard 9mm power all the way to match moderate 10mm loads, not much else can do that in an auto. I've loaded the 12gr under a 135gr nosler, only got to about 1500FPS from my 4.5" XDM though, wonder if the OP is using a 6" or longer barrel.

 

Last edited: Dec 23, 2016

• Dec 22, 2016

• #17

A

atblis

Ultimate Member

May 23, 2010

2,031

I would call these particular loads over pressure. That's a well supported barrel.

 

• Dec 22, 2016

• #18

S

StaFrosty

Active Member

Feb 20, 2011

326

Not in MD anymore!!

I've been getting 1500 out of my AR-10MM carbine I built. These were 180 gr and bought right off the shelf. Be very careful, I tried some reloads with 12 gr's of bluedot and the gun was ripping the cases in half on extraction, had to get out my dental pick to extract the remainder of the case out of the breech.

 

• Dec 22, 2016

• #19

A

atblis

Ultimate Member

May 23, 2010

2,031

Was your 10mm AR a blowback action?

 

• Dec 22, 2016

• #20

balttigger

Ultimate Member

Oct 15, 2008

3,051

Middle River, MD

Get a heavier recoil spring? I converted my G20 into a 21 Longslide for .40Super and .460Rowland behind a 24# recoil spring.