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hanexp

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About hanexp

  • Birthday 10/13/1947

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    hanexp
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  • Gender
    Male
  • Location
    Boulder, CO
  • Interests
    photography, fly fishing
  • Real Name
    Blair Hansen

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  1. FrankD

    Hi hanexp, You answered my email on troubleshooting my SVI open gun last month. I'm still playing with powder. I did use 3n38 and 3n37. The gun to my surprise didn't like the 3n38 starting with 9.0 grs. I when up to 10 grains with a hard hitting impact to the hand and muzzle flip.

    I had better luck with 3n37 which SVI's website recommends for guns with no holes in the barrel. Still fine tuning that powder.

    My gun does not have any holes in the barrel just a 3 hole comp. I noticed that the hammer spring take some effort to over come if you cock the gun by hand. SVI uses a 17 lb. hammer spring. I ordered a 15 and 17 lb. hammer springs from Dawson a few days ago. I think the hammer spring I removed took too much powder to overcome the spring that was in the gun.

    What is your thoughts on lowering the grains and going to a 15 lbs. spring. I was wondering if you ever went down this road with your gun?

    I think some of the information I provided was not clear on my part. I should have mentioned that the gun had no holes in the barrel.

     

    Thanks,

    Frank

    1. Show previous comments  1 more
    2. FrankD

      FrankD

      Hi Blair,

      Thanks for the information. I think Brandon is a great idea. I think the spring I took out was a 19 lb spring. I tried WAC with 6.2 grains with a 124g FMJ. I just didn't have enough powder. So I'm loading a batch with 7g and 7.5g.  I did read on SVI website the they recommend 3N37 powder.

      Thanks for your help,

      Frank

       

       

    3. hanexp

      hanexp

      Hi,

      I use WAC for 9mm only. The advantage of 38SC is that with the longer case, you can load slower powders, like 3n38,N105 etc. With the commander length barrel in my 9mm shorty (not the SV), 7.0 g WAC, 125g JHP, OAL 1.625 gets me Major PF. In that gun, I use 7.5 with 115g JHP. I do prefer the 115g bullet load. YMMV in your gun, altitude, etc.

      3N37 is probably a great powder; I don't have any experience with it. With the 38SC (three holes), I like 3n38. N350 is pretty close to 3N38 in my pistol.

      I am interested in what Brandon's might suggest may be optimum for a barrel with no holes, if you learn anything. 

      Best,

       

      Blair

    4. FrankD

      FrankD

      Hi Blair,

      Sorry for not getting back to you sooner GE keeps on the road from time to time. I'm presently trying AutoComp at 6.8 and 6.9 grains with a 124 grain bullet. Hopefully I will ge to the range this week if it stops raining.

      Thanks for your input.

      Frank

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