Multiple casing lenghts in same gun....?

Just a little question...It seems that your new feeding concept/design might be able to handle multiple casing lenghts...9x18/9x21/9x23 in the same gun would that be possible?
Greetings!

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Permalink Reply by Arne Boberg on May 31, 2010 at 2:20pm

The XR9 series is specifically designed around the 9mm Luger cartridge (9x19). That means that this gun will only feed a case length of .75" or 19mn. A different magazine would have to be used to feed the other styles of ammo. For 9x18 there would most likely be no other design changes other than a different magazine and a slightly different and shallower chamber. For a 9x21, you would also need a different magazine and a different depth chamber. For the 9x23, in addition to the two previously stated changes, I am guessing that the back of the gun would have to be lengthened by about 2mm - in other words, a significant re-design. While I haven't checked the COL of these cartridges, the XR9 grip may also have to be made horizontally longer.

I never really considered the longer cartridges before (9x21 and 9x23) because I thought they had fallen from popularity with expensive and scarce ammo. Any input on whether to pursue these calibers on an XR9 platform would be helpful.

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Permalink Reply by reg emmerich on June 2, 2010 at 12:30pm

hi im new here . so firstly thank you for such a new exciting pistol design . 9 para , 9 luger , 9x19 or 9mm nato are the absolute best for almost all pistols . forget the rest . IMHO .

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Permalink Reply by Paul Spangler on July 19, 2010 at 4:20pm

How about 7.62x25? These rounds can be in the power range of the .357 SIG. I know I'd buy a modern pocket pistol in this caliber if it was available.

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Permalink Reply by Arne Boberg on July 21, 2010 at 3:25pm

I like that cartridge and the idea of a small, fast-moving bullet, which benefits from the longer-barrel of the XR9. This is a cartridge we will be looking at.

Paul Spangler said:

How about 7.62x25? These rounds can be in the power range of the .357 SIG. I know I'd buy a modern pocket pistol in this caliber if it was available.

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Permalink Reply by Blueorison on August 7, 2010 at 11:52pm

I second Reg.

Per your inquiry, Arne, 9x23 is PRETTY MUCH only provided through reloading. I've shot a 9x23 custom 1911 and spoke to the owner on cartridge availability.

Regular-sized gun stores usually do NOT stock a variety of this ammunition. 9x21 also is quite hard to find in stores.

The Tokarev rounds ARE cheap to get.

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Permalink Reply by Arne Boberg on August 9, 2010 at 8:10pm

Aren't those cartridges rather longish?

Arne Boberg said:

I like that cartridge and the idea of a small, fast-moving bullet, which benefits from the longer-barrel of the XR9. This is a cartridge we will be looking at.

Paul Spangler said:
How about 7.62x25? These rounds can be in the power range of the .357 SIG. I know I'd buy a modern pocket pistol in this caliber if it was available.

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Permalink Reply by Blueorison on August 9, 2010 at 10:11pm

Yeap, 9mm is in the low 1.1's and the Tok is in the 1.3's. My main concern would be the exceedingly high PRESSURE.

The frame would take QUITE the beating and putting heavy springs in it might cause unwanted situations with weaker operants being unable to chamber or operate the slide.

I RO for orientations in which new members are required to demonstrate handgun safety.

99% of women in those classes cannot pull the slide of a glock back and a third of the guys have problems doing the same properly with certain handguns due to the heavy springs in smaller frames.

The issue is that they often sweep themselves with the muzzle while wrestling with the slide.

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Permalink Reply by Arne Boberg on August 11, 2010 at 11:41am

I am not concerned about the slide force since the XR9 uses a rotating-barrel lockup. Since the barrel literally unscrews itself from the slide, and there is .250 inches of "lock time" creating a huge delay and reducing recoil at the same time, there is no need for a strong slide spring. I have a Sig Mauser .45 and a Beretta Cougar 9mm, both rotating barrel guns that have very weak slide springs.

The Tokarev round would require some significant re-design, but it would be worthwhile if the market is there.

Blueorison said:

Yeap, 9mm is in the low 1.1's and the Tok is in the 1.3's. My main concern would be the exceedingly high PRESSURE.

The frame would take QUITE the beating and putting heavy springs in it might cause unwanted situations with weaker operants being unable to chamber or operate the slide.

I RO for orientations in which new members are required to demonstrate handgun safety.

99% of women in those classes cannot pull the slide of a glock back and a third of the guys have problems doing the same properly with certain handguns due to the heavy springs in smaller frames.

The issue is that they often sweep themselves with the muzzle while wrestling with the slide.

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Permalink Reply by Blueorison on August 11, 2010 at 4:22pm

I forgot about the lockup mechanism :)

Silly me. Yeap there are many that purchase Tok. pistols because they are cheap and very powerful. I, for one, would definitely get one, the round is plentiful and low priced, yet very powerful.

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Permalink Reply by Joseph Collins on August 18, 2011 at 11:17am

I would be interested in a 7.62x 25 cartridge chambering in a modern pistol with a 4 to 5 inch barrel. This would be an ideal choice for women.

Arne Boberg said:

I like that cartridge and the idea of a small, fast-moving bullet, which benefits from the longer-barrel of the XR9. This is a cartridge we will be looking at.

Paul Spangler said:

How about 7.62x25? These rounds can be in the power range of the .357 SIG. I know I'd buy a modern pocket pistol in this caliber if it was available.