tightgroup tiger
Member
I've read all the warning about bullet setback in 9mm and it causes high pressure spike that can damage your gun.
In looking at Lymans 49 edition it also has the same warning not to seat bullets at a shorter length than specified in the data. I've read a few explainations on thr about this but no one really explained why the pressure spikes from seating to deep
I also follow published data from the powder mfgs and cross reference to reloading manuals.
Lymans shows two different loads that are compressed loads for the 115gr jacketed data on page 341 of the 49th edition. So it obviously doesn't have to do with air space, or does it with faster burning powders?
What exactly happens when the bullet is seated to deep that makes the pressure go up higher than it should?
In looking at Lymans 49 edition it also has the same warning not to seat bullets at a shorter length than specified in the data. I've read a few explainations on thr about this but no one really explained why the pressure spikes from seating to deep
I also follow published data from the powder mfgs and cross reference to reloading manuals.
Lymans shows two different loads that are compressed loads for the 115gr jacketed data on page 341 of the 49th edition. So it obviously doesn't have to do with air space, or does it with faster burning powders?
What exactly happens when the bullet is seated to deep that makes the pressure go up higher than it should?