SEATING DEPTH AND CASE PRESSURE

[GermanShorthair]

Iam new to this forum but have been reloading for a couple of years now so I hope this question makes sense!

I bought a Stoney Point Overall Case Gage so when I reload I can get the bullet to just kiss the lands of the rifling! When I refer to my reloading manuals they give me a max O.A.L of the loaded round..... but when I use the Stoney Point Gage my O.A.L. of my loaded round far exceeds what the reloading manuals max length is!

Is this dangerous and can it change the pressure inside the cardridge case since there is more room inside the case???

Thanks,
German Shorthair

 

[FOTIS]

Welcome to the forum!

If you start below max and work up you will be fine. Seating way out there increaces case capacity and kinda decreases pressures. However if doing so means the bullet is rammed up against the rifling (kinda radical I know) will increase the pressures.

 

[Ol` Joe]

Seating out unless you jam the bullet in the lands wont raise pressure, actually it likely will reduce it due to a larger chamber volume. Going shorter can raise pressure but in most bottle neck cartridges you will have to reduce it quite a bit to get in trouble. Straight walled pistol cartridges should be loaded to the COL specified in the manual, one can vary pressures by altering the lenght quit easily if you`re not careful. The COL you use should be a part of the load from the start while working up and if pressures arise you will hopefully spot them before they cause trouble. The Max COL listed in most books is the SAAMI max that will fit in all factory chambered rifles magazines, unless listed right with the data as a part of the load. Speer and Hornady do it this way and their COL is part of the load its self.. You may though have a problem loading your rifle if you are too much over.

 

[GermanShorthair]

THANKS A BUNCH "POP" & "OL' JOE" .IT IS GREATLY APPRECIATED!!!