308 vs 30-06 case

[swampratt]

Did you know the extractor groove in the 30-06 is narrower than the .308 or .243.
Groove in the .308 and .243 are close to the 45acp.
To get good extraction from the cut down cases when used in a 45 acp the groove needs the wideness.
30-06 does not extract as reliably.
Look and compare for yourself.

 

[mr ed]

Head thickness is thicker on 243/308 by 2 sheets of notebook paper.
45 ACP is larger diameter than any of them.
What are you making? Crimped shot shells ?

 

[mr ed]

If shot shells the front 1/2 inch or so needs swaged in like a bullet so when it flares out it won't be too tight in the bore to extract and eject.

 

[KurtM]

Quick answer is yes the grove is much more narrow in 30-06. When making shotshells use 308/243, or you will beat on the extractor, and possibly break its hook off. Been making shotshells since 82 for the acp. I use a cut off 410 shot wad a bunch of 9 shot and a thin plastic over card. Even made a punch the right size to punch out the over card.