Re: Enlarged Primers Pockets--/ What is the cause?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">OK; we simplify.
When cartidges fire, enough pressure is generated to stretch all portions of the case outward. The chamber also expands some, then the pressure diminishes and everything shrinks back down to roughly the original dimensions. Not quite, and this difference results in primer pocket growth.
How big things get and how much pocket growth occurs is a direct consequence of peak pressures, but some growth is always present. Primer pockets are always growing with each firing, but how fast this growth occurs is a matter of pressure management. Too much pressure results in too much growth, too soon.
Some brands of brass have a rep for softness; Fed first, then Rem. I use Win and find it's a good compromise between quality and cost; and that's all I expect I'll ever really find with this..., a good compromise.
The ultimate conclusions about primer pocket growth and hotter loads are fairly straightforward and obvious.
Greg </div></div>
This, exactly....well put Greg.
With a rigid annealing regimen, the only way I know to retire a batch of brass is when the primer pockets get loose.....and no, I don't load hot either.
And I'll add, anyone that's never seen a loose primer pocket with normal loads, either doesn't anneal to stretch case life, or they just don't reload much.......
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Greg Langelius *</div><div class="ubbcode-body">OK; we simplify.
When cartidges fire, enough pressure is generated to stretch all portions of the case outward. The chamber also expands some, then the pressure diminishes and everything shrinks back down to roughly the original dimensions. Not quite, and this difference results in primer pocket growth.
How big things get and how much pocket growth occurs is a direct consequence of peak pressures, but some growth is always present. Primer pockets are always growing with each firing, but how fast this growth occurs is a matter of pressure management. Too much pressure results in too much growth, too soon.
Some brands of brass have a rep for softness; Fed first, then Rem. I use Win and find it's a good compromise between quality and cost; and that's all I expect I'll ever really find with this..., a good compromise.
The ultimate conclusions about primer pocket growth and hotter loads are fairly straightforward and obvious.
Greg </div></div>
This, exactly....well put Greg.
With a rigid annealing regimen, the only way I know to retire a batch of brass is when the primer pockets get loose.....and no, I don't load hot either.
And I'll add, anyone that's never seen a loose primer pocket with normal loads, either doesn't anneal to stretch case life, or they just don't reload much.......
