Quote Originally Posted by sneakerd View Post
I would like to know what each bullet was and what medium was used for testing.
IDK, but I'll take an educated guess at them.

From left to right:
-Ranger STX,
-Golden Saber (or maybe a Gold Dot, I would have to see a side shot of the bullet to really tell),
-PMC El Dorado Starfire,
-Don't know...
-Furthest right (a guess, might be wrong) a Corbon.


Please keep in mind that most reloading charts will show similar/equal chamber pressures for 9mm and 40, but there is a significant difference in momentum as the 40 cal bullets are heavier. Mass x Velocity is momentum. In determining recoil, Newton's 3rd law relates the mass times the velocity of the bullet will equal the mass times the velocity of the gun during recoil. So, the gun being shot does come into play as to the "snappiness" of the recoil, but consistently there will be more overall momentum from the bullet's momentum. Secondly,

Madusa (Medusa spelled with an a? ); I confess, SAAMI chamber pressures for 9mm and 40 are the same, 35,000 psi, but the smaller diameter of the 9mm allowed for more metal to be used in the older barrels without having to make a gun the size of a brick. The webbing in a 9mm vs a 40 are very different too assisting in controlling the pressure. The 9mm webbing to diameter ratio is higher rendering more strength to the chamber when fired. 40 cal cases are thinner in the webbing thus the whole "guppy brass" issue.

Ultimately, there is a lot of truth in this thread. It all really points to the fact that firearms technology has plateaued. There is now very little difference mechanically in modern firearm design and modern ammunition design. Pick one and practice. I personally have more 40s than anything, but that is because 40 cal is king in action pistol sports. It drove my choice. I am running a very very close 2nd with 9mm pistols. They are simply cheaper to shoot. With the rising price of lead and copper, I have drastically thinned out my 45s. .40 cents a round for decent factory target ammo is pretty brutal, and even reloading costs are significantly higher. 10mm ammo prices? No thank you.