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Old 03-20-2020, 10:23 AM
Ray Ray is online now
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Default Primers protuding

Hi, I have an interesting problem that is puzzling me. Im starting to load some .45 Auto Rim to use in my brazilian S&W 1917/37 and since
its somehow difficult to me now, due to regulations, to buy large pistol primers Im using a kind of primer, non corrosive and made by CBC. called Tupan 56 thats more easy to find. Its a bit large and the Berdan primer pockets were opened a bit more to acomodate them.So far so good. I fired today 5 or 6 cartidges, loaded only with primers.They detonate all right but tied up the cylinder, stopping its rotation.Could this have been caused by lack of a bullet in the cartrigde? Why is the primer, after been duly seated, protuding upon firing ?
As I have no factory rounds to spare and use a bullet puller and try this with a normal large boxer primed case Im at loss.
I suspect Ill have to buy an assortment of boxer 45 cases and large pistol primers (a bit expensive by by-passing the proper channels- too much red tape to get them through CBC)

Thanks, Regards, Ray
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Old 03-20-2020, 10:30 AM
M16 M16 is offline
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Primers backing out are caused by the case not being pushed back against the recoil shield. I doubt if a full load would have the same results as primed case. Actually people who shoot wax or plastic bullets drill out the primer hole to prevent this. You should be good to go when adding powder and bullets.
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Old 03-20-2020, 10:34 AM
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A normal powder charge will shove the case back into the recoil shield and reseat the primer
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Old 03-20-2020, 11:31 AM
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Thanks folks, regards, Ray
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Old 03-20-2020, 11:34 AM
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Thanks folks, MM16 could you explain the drilling of the primer hole procedure, thanks, regards Ray
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Old 03-20-2020, 07:02 PM
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Quote:
Originally Posted by Ray View Post
Thanks folks, MM16 could you explain the drilling of the primer hole procedure, thanks, regards Ray
The flash hole is drilled out slightly smaller than the diameter of the primer. There is no powder used in shooting wax or plastic bullets. This keeps the primer from backing out and theoretically increases thrust to the plastic or wax bullet. Once done these cases can not be for regular loads ever again.


Here is a link that explains it better than I can.


American Rifleman | How to Make and Reload Wax Bullets

Last edited by M16; 03-20-2020 at 07:07 PM. Reason: add link
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Old 03-20-2020, 09:19 PM
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Thanks M16, regards, Ray
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Old 03-21-2020, 12:37 PM
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Ray, don't drill out the primer hole for loading normal ammo. That is only for wax bullets used in Cowboy Action ammo.

Like said above, you will vaccine once you are the powder and bullet. Have fun, be safe.
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