Name the Crimp.

[bruceflinch]

I know the taper crimp & roll crimp. Last night, Big103 came over to learn some reloading techniques. He brought some Tokarev pistol ammo to show me.

The ammo uses 3 dimples on the case neck to hold the bullet in place. Tried to take pics but my camera won't do an in focus closeup.

Is there a specific name to that type of crimp?

[XDRoX]

I call it the 3-dimple crimp.

What do I win

I don't know the real name, but a lot of old military ammo is crimped like this.

[bumpo628]

stab crimped

http://www.jgsales.com/product_info.php/ammo-for-handguns/7-62x25-30-tokarev/p/7-62x25-polish-fmj-1260rd-in-can/cPath/25_28/products_id/3145

[bruceflinch]

I call it the 3-dimple crimp.

What do I winI don't know the real name, but a lot of old military ammo is crimped like this.

I set aside a cookie for you, but I ate it!

[Canucky]

http://www.midwayusa.com/viewproduct/?productnumber=139832

Sorry it aint much help

[gunboat]

I go with bumpo

[noylj]

Yes there is a proper name for. Something like impact crimp or something. It is truly a military thing and does not improve the accuracy of the round.

[bumpo628]

Here is some more info about stab crimping.

From here: http://www.frfrogspad.com/miscellg.htm

Stab or ring crimping, used only on jacketed ammunition, consists either several impressed dimples or a groove pressed into the case mouth by a collet. The crimp can either enter a groove on the bullet or can just be pressed into the bullet body (which distorts the bullet). It is primarily used on military or commercial heavy caliber hunting ammunition where rough handling may be encountered. It is the least conducive to accuracy.

Crimp Types--L to R: No crimp, stab crimp, taper crimp, roll crimp

[bruceflinch]

Here is some more info about stab crimping.

From here: http://www.frfrogspad.com/miscellg.htm



Crimp Types--L to R: No crimp, stab crimp, taper crimp, roll crimp

You Da Man Bumpo! Big103 said it wasn't unusual for the case to split @ the dimples when shot.

[Anti-Hero]

Is it a bad photo or are those cases already cracking?

[bumpo628]

No problem, Bruce.

Is it a bad photo or are those cases already cracking?

Nope, those are factory cracks. Some of the surplus Tok ammo out there is pretty bad.

I've never seen it as bad as the pic, but mine do tend to split after firing. I've been using the Polish stuff they sell at J&G Sales, btw.

[Bladeshark]

I've never seen it as bad as the pic, but mine do tend to split after firing. I've been using the Polish stuff they sell at J&G Sales, btw.

Even with cracking like in the pic they will still shoot fine. Once they're chambered the cracks really make no difference unless they change the pressure of the crimp holding the bullet in place. Even that should be minor.

I've shot a lot of Surplus Tok like that.