.45 Ammo questions???

C

Cyric13

New member
Just got 4 boxes of 20 rd 230 gr Hydrashock and opened the box and every round had crimp marks on them. Is this normal? Also bought a couple of boxes of Masters ammo and was wondering if anybody here had shot some, and how they liked it?

thanks Cyric
 
What do you mean by "crimp marks"?

Crimping generally means the mouth of the case is crimped (i.e., folded or pressed in) to the bullet cannelure, and is normal on much ammo.

If you are referring to the notches around the bullet nose, they are there intentionally on the HydraShok bullet to cause the desired expansion.
 
I'm talking about on the casing right below the bullet. Most rounds I've seen have smooth casings but these have crimp marks on them like if they crimped too tight.

Cyric
 
I believe that the “crimp” is a cannelure. If it runs all round the case at the base of the bullet or slightly below. It is to prevent the bullet from setting back in the case under the stress of feeding, preventing the attendant rise in pressure.
 
Well you sure got me wondering so I got a box of 230 Hydra-Shok ammo out of my reloading room. The box I have is lot number P45HS1 and there are no visible marks around the case mouth at all. Of course there is the distinctive ring around the case at the base of the bullet about 1/4 of an inch below the case mouth. So, if you are talking about the ring at the base of the bullet, that's normal. If you are talking about machine marks right on the case mouth, that's not normal. I don't suppose that helps does it?
 
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Cyric13:
I'm talking about on the casing right below the bullet. Most rounds I've seen have smooth casings but these have crimp marks on them like if they crimped too tight.
[/quote]

What you are describing is called a case cannelure, and it is normal. Not all pistol brass has it, but some does. I have never had a complete explanation for its purpose, but have heard it may be to prevent bullet set-back into the case.
 
You must log in or register to reply here.
Back
Top