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opening gas ports - beretta

Discussion in 'Shooting Related Threads' started by acss, Sep 14, 2009.

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  1. acss

    acss Well-Known Member Supporting Vendor

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    need to open gas ports on a 302/303 barrel to shoot liter loads. what drill bit size?
     
  2. EuroJoe

    EuroJoe TS Supporters TS Supporters

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    2 mm Beretta did it for free at the Grand years ago. You must use a reamer, not a drill bit, the barrels are hard-chrome lined.
     
  3. acss

    acss Well-Known Member Supporting Vendor

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    thanks
     
  4. BAD 303

    BAD 303 Active Member

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    Wally the reamer size i am told is a 29 for Beretta's.
     
  5. claybrdr

    claybrdr Well-Known Member

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    Years ago before flat rib 390 barrels, many of us shot 303 barrels on our 390s in Sporting Clays. Seminole and Angleport opened the ports and I believe Bad is correct that a 29 drill was the size they used. You could call either company and ask.
     
  6. motordoctor

    motordoctor Shoji Tabuchi in Branson

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    be very careful that you do not break the drill off in the hole while trying to open them. i would recommend a reamer rather then a drill.
     
  7. mrskeet410

    mrskeet410 TS Member

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    If the 39x Gas Value Set works on a 302/303, and it may, wouldn't that be better than drilling? Pick the spring that is best for your ammo.
     
  8. acss

    acss Well-Known Member Supporting Vendor

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    mrskeet- i cant seem to open that website-- i did send cole an email thanks-- gees - i hate to ask a dumb question to them or you-but- what is a 39x gas valve set??
     
  9. Easystreet

    Easystreet Well-Known Member

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    I don't think the Beretta 302's or 303's had gas valve springs in them. The 390 was the first one that had the ability to shoot either 2 3/4" or 3" loads because it had the self adjusting gas valve in it that bled off excess gas.

    With the 302 or 303, you had to choose to buy either the 2 3/4" version or the 3" version. With the 390, you could load 2 3/4" loads and 3" loads in the magazine at the same time and expect the gun to function perfectly.

    Easystreet
     
  10. acss

    acss Well-Known Member Supporting Vendor

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    easy-i think you are right-- the cole website wont open?
     
  11. front242

    front242 Member

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    The URL was whacked in the previous post. The system adds it's own http:// to whatever you paste into the wesite url box.


    Try this:

    https://colegun.com/390g-beretta-390-gas-valve-spring-set-5-spring-p-385.html


    Tim
    F242
     
  12. halfmile

    halfmile Well-Known Member

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    I traveled this ground, so here you are:

    Calculating the area by Pi x diameter of the existing 303 holes, and adding 15% resulted in a 1/8 inch target size. I went to the local industrial supply house and got a long 1/8 inch drill and carefully opened up the holes using a variable battery drill. You need the long bit because the hole in the cup is where the drill bit must pass to align with the ports. The factory undoubtedly uses this for the initial drilling.

    My 303 now cycles 7/8 and 1 ounce loads very nicely.

    HM
     
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