pocket 9mm, 500 ft lbs of power, 9 mak recoil

Handgun discussions - Handgun ammunition selection, gun modifications, pictures. Tell us about your handgun.

pocket 9mm, 500 ft lbs of power, 9 mak recoil

Postby bali » Thu, 06 Oct 2016 13:22:32

https://www.starlinebrass.com/brass-cases/9X21-Brass/

The longer case of the 9x21 and the huge conical hollowbase cavity of the 45 gr Split Nose bullet make room in the round for a full 3 grs more Alliant Bullseye powder and buy using the much shorter than normal (same length as 90 gr jhp) you gain the room for another 1 gr of Bullseye. Only Bullseye has enough 'octane" to even move the slide with such a lw, short bullet. The skirts of the hollow based bullet flow out at ignition, sealing the bore. The hollowbase also shifts the bullet's weight forward, enhancing accuracy.

the 9x21 is essentially the same case as the discontinued 356 TSW, which delivered 357 Sig levels of power, without wasting mag space on the larger case diameter of the .40 cases, you see. Also, many of the pocket 9's are not available in the .40 parent rd.

By safely driving the 45 gr bullet to 2200 fps in the 3" barrel, you get 4" 357 mag revolver (jhp 125 gr) levels of power, while remaining very controlable. The recoil is the same as 115 grs at 850 fps., which is down near the 380, which is what you want in guns weighing only 15 ozs. Weight is a big deal in a front pants pocket holster.

the Split Nose bullet is a hollowpoint that has a kerf down the center, from the front. At hi-speed impact on animal tests, the bullet splits into 2 full length segments, which diverge and create 2 separate wound channels. At Mach II speeds, the temporary cavities ARE capable of damaging organ tissues that the bullet does not actually touch. This is especially true of the weakened areas between the 2 wound channels. So what you get is 8-10" of penetration, 3/4"x 1.5" of damaged tissue. Tremendous shock, blood loss and tissue destruction. It's also AP, due to it's solid copper construction and high velocity. In states that require handgun bullets to have a "lead core", a #2 birdshot pellet can be epoxied or swaged into the HB cavity. No weight or size of the lead core is specified in state law, you see.


Active, Reserve or Veteran of the United States Army   National Rifle Association (NRA) Member   International Practical Shooting Confederation (IPSC) Member   United States Practical Shooting Association (USPSA) Member   International Defensive Pistol Association (IDPA) Member  
User avatar
bali
Sharp Shooter
Sharp Shooter
 
Posts: 120
Joined: Mon, 03 Oct 2016 16:53:46

Re: pocket 9mm, 500 ft lbs of power, 9 mak recoil

Postby bali » Fri, 07 Oct 2016 20:37:10

mag safe's 9mm swat load, 5" barrel, is 45 grs at 2300 fps. you can load the 9x21 a lot hotter (safely) with such lw bullets. they get moving really easily and that makes chamber pressures drop like a rock. Same concept as the large amount of freebore in Weatherby rifle chambers


Active, Reserve or Veteran of the United States Army   National Rifle Association (NRA) Member   International Practical Shooting Confederation (IPSC) Member   United States Practical Shooting Association (USPSA) Member   International Defensive Pistol Association (IDPA) Member  
User avatar
bali
Sharp Shooter
Sharp Shooter
 
Posts: 120
Joined: Mon, 03 Oct 2016 16:53:46

Re: pocket 9mm, 500 ft lbs of power, 9 mak recoil

Postby bali » Fri, 07 Oct 2016 21:22:08

just because YOU never thought of something does not mean that better minds have not thought of it, ya know.


Active, Reserve or Veteran of the United States Army   National Rifle Association (NRA) Member   International Practical Shooting Confederation (IPSC) Member   United States Practical Shooting Association (USPSA) Member   International Defensive Pistol Association (IDPA) Member  
User avatar
bali
Sharp Shooter
Sharp Shooter
 
Posts: 120
Joined: Mon, 03 Oct 2016 16:53:46



Return to Handguns/Pistols

Who is online

Registered users: Globetruck, Google [Bot], jpmuscle, WRW

cron
Please Support
Our Sponsors