10mm vs .40 ammo ?

[timmerk]

Hi!

What are the differences and pros and cons?

Can you tell me the prices of both, too, please?

Thanks all!

 

[pogo2]

For Winchester Silvertips

I happened to have the Winchester data for their Silvertip hollowpoints in these two calibers:

.40 S&W 155 grain - velocity 1205 fps, energy 500 ft-lbs.

10mm 175 grain - velocity 1290 fps, energy 647 ft-lbs.

For a "good" full power loading in each caliber, the 10mm is generally a heavier bullet travelling faster, giving about 25-30% more muzzle energy. The 10 mm ammo generally costs more also, perhaps up to 40% more, depending on the source.

 

[caz223]

http://thehighroad.org/showthread.php?s=&threadid=495
Plenty of threads like this one in the archives, feel free to use the search function if this link is confusing.

I can't comment on full-power, and defensive loads, but the cheap stuff in .40 is about $8.50 a box, and in 10mm, the cheap stuff is $15.00 a box, sometimes a little less.

Looking at those prices, who would buy a 10mm?
That's only half the story, .40 is not a hot-rod, and can't be loaded much hotter than 10mm lite 'fbi' loads.

10mm can be loaded HOT!

http://www.doubletapammo.com/main_site/index.html

A 10mm enthusiast started double tap ammo because he was unhappy with full-power ammo availability for the 10mm.
Take a look at his defensive ammo.
135 grain nosler hollow point at 1600 FPS!!!!
Over 750 F.P.E.
Holy energy, batman!! Awesome expansion, limited penetration.
Best self defense loads that I can think of.
$23.95 a box of 50.
A glock 20 with a pre-ban mag can hold 15+1 of those.
And you can buy +2 extensions for pre-bans!
That's why people buy guns chambered in 10mm!

 

[denfoote]

Difference: one's shorter than the other!!

10mm is way better!!

 

[Sean Smith]

I can't comment on full-power, and defensive loads, but the cheap stuff in .40 is about $8.50 a box, and in 10mm, the cheap stuff is $15.00 a box, sometimes a little less.

No, the ripoff stuff is $15 a box. The cheap stuff is $8.00-9.50/50 by the case if you order from Georgia Arms.com, and Ammoman.com often has cheap Federal American Eagle ammo in bulk too.

http://www.georgia-arms.com/pistol.htm#ee

What are the differences between 10mm and .40 S&W?

- The 10mm case is longer, has thicker walls, can safely withstand much higher pressures, and uses large pistol primers instead of small pistol primers.

- The SAAMI average peak pressure spec for .40 S&W is 35,000 psi, while it is 37,500 for 10mm Auto.

- A 10mm cartridge with a 180gr bullet loaded has roughly DOUBLE the internal volume for powder that a .40 S&W cartridge loaded with a 180gr bullet has. Hence a .40 S&W load will launch a 180gr bullet at 950 ft/sec, while a 10mm can launch a 180gr bullet over 1,300 ft/sec.

- 10mm can handle heavier bullets and still launch them at respectable speeds; a 10mm can launch a 220gr bullet faster than a .40 S&W can launch a 180gr bullet.

- Because its overall length is shorter and it is considerably less powerful, the .40 S&W can be chambered in physically smaller guns than the 10mm Auto can.

- 10mm practice ammo is more expensive than .40 S&W ammo generally, but not as much as people claim... if you are smart enough to not buy at the corner store and pay 50% more than you should.

 

[mrapathy2000]

both are good rounds though .40S&W has not had been engineered well imo. should be able to handle higher pressure and slightly bigger variety of gr bullets and fairly hot rounds. the lightest two grains produce the best results speed and ft lbs wise. 135gr gets up to 1300fps and 500ft lbs, 155gr gets to 1200fps and 500 ft lbs. took them years to get that too. the common 180gr stinks. 10mm is nice and has similar characteristics to 41magnum while .40S&W best comes close to .357magnum. 9mm can almost do better though I would rather have 135gr bullet doing 1300fps in .40 than anything in 9mm.

10mm makes a better hunting round than .40S&W.

 

[10-Ring]

I enjoy shooting the 10mm. The 40 S&W amoo is alot easier to find tho.