tnieto2004
Member
- Joined
- Jan 15, 2007
- Messages
- 1,389
6.1gr of AA#5 is close to what I use with a 158gr bullet.6.1gr of #5 pushing a 125 gr HP 38sp.
My first impression is that this must have been a very light load, since you're not getting obturation (a good seal around the case), and it's leaving lots of unburnt power in the chambers; this also allows the gas from the powder that DOES burn to leak around the edges of the case mouth, darkening it the way you show. What's the load you were using for these (powder and weight)?
Agreed.
The tool marks are a case cannelure. They're to help prevent bullet setback.