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GP100 10mm Conversions

Discussion in 'Handguns: Revolvers' started by jmd2000, Aug 31, 2008.

  1. jmd2000

    jmd2000 New Member

    Clements website says they no longer do work on Ruger DA revolvers - is anyone doing the 10mm GP100 conversion they used to do?
  2. Gunz

    Gunz Well-Known Member

    Is the 10mm about the same as a 357 Mag?

    10mm conversion on the GP100 would require moonclips?

    I figure it would be novel to have a 10mm revolver, but a 610 from S&W can be bought, and the barrel cut down, and recrowned by a good gunsmith much faster than making a recut of the GP100 cylinder, and rebore the barrel for a 40 caliber bullet.

    You may be happier with a full blown 357 mag thumper round from Buffalo Bore or Doubletap to exceed the 10mm performance figures.

    That GP100 is a stout little revolver that can handle some loads, if your hand can deal with it.
  3. razorblade31

    razorblade31 Active Member

    I think that they are still doing the conversions. A guy named Bullman at 10mmtalk has one.
  4. freakshow10mm

    freakshow10mm member

    I'm tooling up to perform the conversion. The cylinder chambers seem easy, but drilling and rerifling the barrel seems tricky. I'd like to do a SP101 conversion.

    The 610 cut/recrown is probably a more economical option. I, like many, prefer Ruger revolvers to S&W.
  5. easttexas

    easttexas Active Member

    Bullman had his GP converted the same time I did two years ago he just likes to show it off now and again, as will I when I get done with my customizing. Clements site says he doesn't even work on DA revolvers right now, I read some where (may have been here) that someone recently pleaded with him to convert a GP to a 10mm and was given an adamant "no". But as a consolation he will do 10mm conversion's on Ruger SA's.
  6. 19-3Ben

    19-3Ben Well-Known Member

    I'd bet Bowen could do it for you...for a price.
  7. Bush Pilot

    Bush Pilot Well-Known Member

    Your first born and then some.
  8. big_bang

    big_bang Well-Known Member

    They're both fine rounds, but how do you qualify this statement? DoubleTap's most energetic .357 is 710 ft-lb of muzzle energy out of their 4" revolver. Their most energetic 10mm is 767 ft-lbs...and the test weapon was a Glock 20.
  9. freakshow10mm

    freakshow10mm member

    57 ft lbs of energy doesn't mean squat.
  10. 19-3Ben

    19-3Ben Well-Known Member

    Very true. The other thing to consider is that they tested the 10mm round in a semi-auto. Let's see if it's still the same velocity when it has to deal with a cylinder gap. I'd bet things even out.
    I'm not positive but I'd bet that if we up the ante to a 6"bbl, .357 takes the lead because it gains a lot with longer barrels.
  11. big_bang

    big_bang Well-Known Member

    Well, I'm not trying to be contentious and get into a pet-round fight. I don't believe that a guy can easily and categorically say that the .357 "outperforms" the 10mm.

    The OP likely wouldn't have asked the question if he were satisfied with the .357 in that firearm.

    I won't offer any more on the subject.
  12. Vicious-Peanut

    Vicious-Peanut Well-Known Member

    Check out what Buffalo Bore has for the .357, it beats the 10mm. Double Tap specializes in the 10mm, so it is likely they spend more time on it than the other rounds.

    I love the 10mm as much as the next guy, but .357 has the potential to be more powerful.
  13. Dgreno

    Dgreno Well-Known Member

    So. Does anyone convert GP100's to 10mm? Lets get back on the OP's topic.
  14. BigBlock

    BigBlock member

    Why would anyone do that? It is a pointless modification. That would probably be one of the reasons why everybody refuses to even try.

    The .357 will do EVERYTHING the 10mm will do, and then some.
  15. freakshow10mm

    freakshow10mm member

    The 10mm and the 357 Magnum are ballistic twins when being launched from their respective platforms. The both can reach 1600fps or so with a 125/135gr bullet and 1200-1250fps with a 200gr bullet.

    The 357 Mag is usually tested in a 4 inch barrel and the 10mm is tested in a 5 inch barrel, but in an auto pistol the cartridge is in the chamber which is integral with the barrel. In reality the 10mm from a pistol is actually in a 3.75 inch barrel and not a 5 inch barrel (5-1.25 for the OAL).

    Both can use custom bullets much heavier than the standard 200gr limit. I routinely shoot the 357 Mag with a 220gr SWC and the 10mm with a 225gr SWC. I make JHP bullets for the 10mm weighing up to 245gr and they run just fine.

    The 357 Mag will have better sectional density as the weights are the same as the 10mm but the diameter is smaller in the Magnum.
  16. mbkmkk

    mbkmkk Well-Known Member

    All this talk about "who can beat who" WHO CARES! It is just cool to have one!:D
  17. Dgreno

    Dgreno Well-Known Member

    Does it matter why? Someone asked a question and everyone strayed away from it and began a .357 vs 10mm caliber war.:banghead:
    You do have to admit that a 10mm revolver does have a very high cool and fun factor to it and the GP100 is a great platform for such a round.

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