Sig P220ST dragging firing pin on primers?

[Richard.Howe]

I took out my new P220ST a couple of days ago. The pistol takes a little getting used-to when you come from a 1911 background...but it's pretty accurate and has nice recoil characteristics.

One issue: why would 90% of my brass show that the firing pin had dragged on the primer? Is this a timing issue, or something that will go away with break-in? All ammo fired was 230 gr; some Winchester white box and the rest CCI.

On a potentially related note, the gun's POI is about 4" high at 15 yds (and 1" left, but that can be fixed).

What's happening?

Thanks all,
Rich

 

[Frohickey]

I've heard/read that the Sigs are designed that way, to have the firing pin drag on the primers.

All of my Sigs do that.

 

[jimmyjoebob]

my 220st doesn't do it, but it is know to happen in guns, in fact my 1076 does it just a smidge. You could try putting a beefier recoil spring in, but I doubt that would change anything

 

[cslinger]

Supposedly a purpose design. The firing pin sticks out a bit on extraction and firing in order to keep gunk out of the firing pin channel.

Chris