Results 1 to 3 of 3

Thread: Another intermediate round design - "improved" 10mm/357 SIG cartridges

  1. #1
    Happy Camper hcpookie's Avatar
    Join Date
    Feb 2004
    Location
    Colorado Springs
    Posts
    7,685
    Feedback Score
    3 (100%)

    Default Another intermediate round design - "improved" 10mm/357 SIG cartridges

    Both of these rounds may be good candidates for a pistol/intermediate conversion project.

    I was surfing the Accurate Reloading wildcat forum and ran across someone asking about a "long" 357 SIG cartridge, and found the 9x25 Dillon. Dillon as in the reloading company.

    It is based on a 10mm cartridge case necked to a .355 (9mm) bullet. 90 gr/2100 FPS & 115 gr / 1800 fps. That's basically what SIG did with their .357 SIG round, but it the Dillon is longer. COL is similar or the same as 10mm so you can use 10mm mags.

    Supposedly the Lyman pistol reloading manual has load data for it.
    I found this reloading data on a web search but I'd have to cross-check it with the Lyman data:

    Primer only use FEDERAL MAGNUM LARGE RIFLE NO.215
    Bullet powder long.mm ipsc factor
    graain type manufac manufacture...... Type...grain ........... ...............
    100 FMJTC fiocchi accurate...........NO9....16.2 31.8 mm 178
    100 FMJTC fiocchi accurate...........NO9....16.5 31.8 mm 186
    108 JSPOG zero accurate...........NO9....14.9 31.8 mm 180
    115 FMJ winchester accurate...........NO9....14.3 32.2 mm 179
    115 FMJ winchester vihtavuori oy.....N110....15.1 32.2 mm 179
    115 FMJhp winches vihtavuori oy.....N110....15.1 32.2 mm 178
    124 FMJfp hornady vihtavuori oy.....N110....14.2 32.2 mm 179
    124 FMJfp hornady accurate...........NO9....12.7 32.2 mm 179
    130 FMJ hornady vihtavuori oy.....N110....13.3 32.2 mm 178
    130 FMJ hornady accurate...........NO9....11.9 32.2 mm 179
    From the little information I can find on the web, this round is hot enough that it "erodes compensators" on the IPSEC guns. That's proboably why it isn't more popular than it is... wouldn't that also cause throat erosion? If it is hot enough to burn a compensator (I wonder how much) then it seems the throat is going to be hurting as well?


    I also found another one - the 9x30. Someone took the idea of the Dillon 9x25 one step further and used a 10mm Magnum round as the starting point. I read on the Dillon forums that "9x30 velocities with 115 grain projectiles out of a 6 inch barrel are 2300 FPS," and "the Blue Press ran a story on this in June 1995". I think that is like a "mini" 357 SIG.
    I'm sure the 9x30 is also hot enough to cause this "erosion".

  2. #2
    tired of idiots vz58's Avatar
    Join Date
    Sep 2006
    Location
    central NC
    Posts
    2,276
    Feedback Score
    25 (100%)

    Default

    What about the 400 corbon?
    Or the 40 super (now that is a hot round)
    Or take a 45 wm and hit it with a 400 die for a longer 40 super?

  3. #3
    Happy Camper hcpookie's Avatar
    Join Date
    Feb 2004
    Location
    Colorado Springs
    Posts
    7,685
    Feedback Score
    3 (100%)

    Default

    The .40 stuff is definitely better IMO than 10. "Most" of the performance in a smaller package can't be beat. Problem is necking .40 down and you don't have much room. Of course a .40 is a "short 10".

    I didn't realize but Russia already has a 9x30. It is called the "Grom" aka Thunder. It is a long 9x18 round.

Search tags for this page

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •